| from 11/07/2003 to 12/14/2007 in Business Source Premier |
| from 01/06/2003 to present in General OneFile |
| from 01/01/1987 to present in LexisNexis Academic (selected full-text only) |
| from 12/01/1999 to present in ABI/INFORM Global |
| from 03/27/2000 to present in Academic OneFile, Business Source Premier, General OneFile, LexisNexis Academic and MasterFILE Premier |
| from 01/18/2008 to present in Business Source Premier |
| from 05/03/2001 to present in LexisNexis Academic |
| from 01/01/1987 to present in LexisNexis Academic (selected full-text only) |
| from 06/30/2006 to present in LexisNexis Academic |
| from 05/22/2000 to 02/09/2005 in General OneFile |
| from 02/01/2007 to present in Academic OneFile and Literature Resource Center |
| from 10/23/1998 to present in LexisNexis Academic |
| from 12/01/1997 to present in Health Source: Consumer Edition and MasterFILE Premier |
| from 06/01/2001 to present in ProQuest Research Library |
| from 08/01/2001 to present in General OneFile |
| from 01/01/2008 to present in General OneFile |
| from 01/01/1995 to 01/31/1999 in Academic Search Premier and MasterFILE Premier |
| from 09/01/2001 to present in Health Source: Consumer Edition |
| from 01/01/2003 to present in Health Source: Consumer Edition and Health Source: Consumer Edition |
| from 08/03/1984 to 10/27/2005 in Academic OneFile and General OneFile |
| from 01/06/1995 to 10/20/2005 in Business Source Premier |
| from 02/21/2003 to 10/26/2005 in LexisNexis Academic |
| from 10/16/2008 to present in Business Source Premier |
| from 10/16/2008 to present in LexisNexis Academic |
| from 10/27/2005 to present in Business Source Premier |
| from 10/27/2005 to 10/15/2008 in LexisNexis Academic |
| from 11/03/2005 to 10/09/2008 in General OneFile |
| from 09/07/1995 to 10/09/2008 in Academic OneFile and General OneFile |
| from 10/16/2008 to present in General OneFile |
| from 03/07/2001 to present in LexisNexis Academic |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 10/01/2003 to present in Business Source Premier and MasterFILE Premier |
| from 05/01/2004 to present in Business Source Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 07/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 02/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 07/01/2004 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 04/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 05/01/2004 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 06/01/2004 to present in Business Source Premier |
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| from 11/01/2003 to present in Business Source Premier |
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| from 07/01/2004 to present in Business Source Premier |
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| from 11/01/2003 to present in Business Source Premier |
| from 04/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 02/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 10/01/2003 to present in Business Source Premier |
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| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
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| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
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| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 04/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 07/01/2004 to present in Business Source Premier |
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| from 08/01/2004 to present in Business Source Premier |
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| from 07/01/2004 to present in Business Source Premier |
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| from 07/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 04/01/2004 to present in Business Source Premier |
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| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 05/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 05/01/2004 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 05/01/2004 to present in Business Source Premier |
| from 06/01/2004 to present in Business Source Premier |
| from 10/01/2003 to present in Business Source Premier |
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| from 10/01/2003 to present in Business Source Premier |
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| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 03/01/2004 to present in Business Source Premier |
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| from 06/01/2004 to present in Business Source Premier |
| from 07/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
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| from 11/01/2003 to present in Business Source Premier |
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| from 11/01/2003 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 06/01/2004 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 04/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 07/01/2004 to present in Business Source Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 07/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
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| from 11/01/2003 to present in Business Source Premier |
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| from 12/01/2003 to present in Business Source Premier |
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| from 11/01/2003 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
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| from 08/01/2004 to present in Business Source Premier |
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| from 08/01/2004 to present in Business Source Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
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| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
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| from 10/01/2004 to present in Business Source Premier |
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| from 07/01/2004 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 04/01/2004 to present in Business Source Premier |
| from 07/01/2004 to present in Business Source Premier |
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| from 04/01/2004 to present in Business Source Premier |
| from 05/01/2004 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
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| from 07/01/2006 to present in Business Source Premier and MasterFILE Premier |
| from 01/01/2004 to 06/30/2006 in Business Source Premier and MasterFILE Premier |
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| from 11/01/2003 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 10/01/2003 to present in Business Source Premier |
| from 07/01/2004 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 04/01/2004 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 07/01/2004 to present in Business Source Premier |
| from 06/01/2004 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 01/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 02/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 06/01/2004 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 04/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 12/01/2003 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 04/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 08/01/2004 to present in Business Source Premier |
| from 04/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 04/01/2004 to present in Business Source Premier |
| in LexisNexis Academic (selected full-text only) |
| from 08/01/2004 to present in Business Source Premier |
| from 05/01/2004 to present in Business Source Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 04/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 11/01/2003 to present in Business Source Premier |
| from 06/01/2004 to present in Business Source Premier |
| from 03/01/2004 to present in Business Source Premier and MasterFILE Premier |
| from 03/01/1992 to 12/31/2003 in Academic Search Premier, Business Source Premier, MAS Online, MasterFILE Premier and Points of View Reference Center |
| from 07/01/2000 to 05/31/2001 in MasterFILE Premier |
| from 01/01/1999 to 01/10/1999 in LexisNexis Academic (selected full-text only) |
| from 05/01/1990 to present in MAS Online, MasterFILE Premier and Science Reference Center |
| from 02/01/1993 to 1 month ago in Academic OneFile and General OneFile |
| from 02/01/1994 to present in ProQuest Research Library |
| from 12/01/2003 to present in MasterFILE Premier |
| from 1937 to 12/31/1977 in PubMed Central |
| from 12/01/1937 to 12/31/1977 in HighWire Press (Free Journals) |
| from 09/09/1997 to present in LexisNexis Academic |
| from 01/01/2003 to present in Business Source Premier |
| from 09/01/2000 to present in Business Source Premier |
| from 10/01/1998 to present in Business Source Premier |
| from 01/01/2003 to present in Business Source Premier |
| from 09/01/2000 to present in Business Source Premier |
| from 05/16/2003 to present in LexisNexis Academic |
| from 07/27/2000 to 12/31/2004 in LexisNexis Academic (selected full-text only) |
| from 08/26/2000 to 12/31/2004 in Regional Business News |
| from 04/01/1999 to present in ScienceDirect Health & Life Sciences College Edition |
| from 01/01/1995 to 12/31/1998 in ScienceDirect Health & Life Sciences College Edition |
| from 01/01/1995 to 12/31/1998 in ScienceDirect Health & Life Sciences College Edition |
| from 01/01/1995 to 12/31/1998 in ScienceDirect Health & Life Sciences College Edition |
| from 01/01/1995 to 12/31/1998 in ScienceDirect Health & Life Sciences College Edition |
| from 01/01/1995 to 12/31/1998 in ScienceDirect Health & Life Sciences College Edition |
| from 01/01/1995 to 11/30/1998 in ScienceDirect Health & Life Sciences College Edition |
| from 01/01/2000 to present in Biography Collection Complete and Literary Reference Center |
| from 10/01/1995 to 11/01/2002 in LexisNexis Academic |
| from 02/06/1996 to present in LexisNexis Academic (selected full-text only) |
| from 09/07/1997 to present in Newspaper Source |
| from 01/01/1989 to 06/15/1998 in General OneFile |
| from 07/15/1998 to 07/15/1998 in LexisNexis Academic (selected full-text only) |
| from 02/03/2004 to present in LexisNexis Academic |
| from 02/24/1990 to 07/18/1992 in LexisNexis Academic (selected full-text only) |
| from 01/01/1994 to 12/01/2004 in ABI/INFORM Global |
| from 08/05/2008 to present in Academic OneFile and General OneFile |
| from 03/16/1969 to 06/16/2005 in LexisNexis Academic |
| from 02/09/2009 to present in LexisNexis Academic |
| from 07/29/2006 to present in LexisNexis Academic |
| from 01/01/1999 to 06/30/2004 in Academic Search Premier |
| from 05/01/2006 to 1 year ago in ABI/INFORM Global |
| from 01/02/1995 to present in LexisNexis Academic |
| from 01/01/2006 to present in Academic Search Premier |
| from 12/01/2006 to present in Business Source Premier |
| from 05/06/2008 to present in LexisNexis Academic |
| from 11/12/1998 to 07/01/2004 in LexisNexis Academic (selected full-text only) |
| from 01/02/1989 to 12/21/2001 in General OneFile |
| from 12/09/2003 to present in LexisNexis Academic |
| from 06/01/2003 to present in Literary Reference Center |
| from 06/29/2007 to 05/14/2008 in LexisNexis Academic |
| from 02/12/2009 to present in LexisNexis Academic |