| from 01/01/1995 to present in ScienceDirect Health & Life Sciences College Edition |
| from 02/13/1995 to present in LexisNexis Academic and ProQuest Research Library |
| from 07/30/2008 to present in Academic OneFile and General OneFile |
| from 01/01/1995 to present in ScienceDirect Physical Sciences College Edition |
| from 08/01/2002 to 18 months ago in HighWire Press (Free Journals) |
| from 09/22/2005 to present in Academic OneFile |
| from 01/30/2007 to present in LexisNexis Academic |
| from 04/01/1999 to present in General OneFile |
| in LexisNexis Academic |
| from 10/13/2004 to present in LexisNexis Academic |
| from 3 months ago to present in McClatchy-Tribune Collection |
| from 11/13/1996 to 06/15/1998 in LexisNexis Academic (selected full-text only) |
| from 01/22/2003 to present in LexisNexis Academic (selected full-text only) |
| from 02/16/2003 to present in Newspaper Source |
| from 3 months ago to present in McClatchy-Tribune Collection |
| from 3 months ago to present in McClatchy-Tribune Collection |
| from 02/13/1998 to present in LexisNexis Academic |
| from 01/04/2003 to present in LexisNexis Academic (selected full-text only) |
| from 01/01/1993 to present in LexisNexis Academic |
| from 01/01/2001 to present in General OneFile |
| from 09/01/2003 to present in ABI/INFORM Global |
| in LexisNexis Academic (selected full-text only) |
| from 10/01/2005 to present in General OneFile |
| from 01/01/1999 to 1 year ago in Academic Search Premier |
| from 03/01/1998 to 07/01/2001 in Informe Revistas en Espanol |
| from 03/01/2002 to 10/08/2004 in General OneFile |
| from 07/02/1991 to present in LexisNexis Academic |
| from 03/03/1998 to present in LexisNexis Academic |
| from 01/01/1999 to present in LexisNexis Academic |
| from 03/01/1994 to present in LexisNexis Academic |
| from 01/01/1997 to present in Academic OneFile and General OneFile |
| from 10/01/1982 to present in LexisNexis Academic |
| from 01/01/1997 to present in ABI/INFORM Global |
| from 02/13/1998 to present in LexisNexis Academic |
| from 05/01/1996 to 02/01/1998 in Informe Revistas en Espanol |
| from 01/01/2003 to present in Academic OneFile, General OneFile, LexisNexis Academic and ProQuest Research Library |
| from 02/01/2005 to present in MasterFILE Premier |
| from 01/01/2003 to present in Business Source Premier |
| from 09/01/2000 to present in Business Source Premier |
| from 01/01/1996 to 10/01/1997 in LexisNexis Academic (selected full-text only) |
| in LexisNexis Academic (selected full-text only) |
| from 01/08/1994 to present in LexisNexis Academic |
| from 03/01/1995 to present in General OneFile |
| from 09/22/2006 to present in Academic OneFile |
| in LexisNexis Academic (selected full-text only) |
| from 01/01/2002 to present in Academic OneFile, General OneFile and Literature Resource Center |
| from 07/19/1993 to present in LexisNexis Academic |
| from 01/06/1997 to 3 months ago in Academic OneFile and General OneFile |
| from 07/12/1999 to present in MasterFILE Premier |
| from 08/21/2000 to present in ProQuest Research Library |
| from 09/01/2001 to 09/01/2001 in General OneFile |
| from 11/04/2002 to 11/17/2003 in General OneFile |
| from 01/01/1914 to present in ProQuest Research Library |
| from 09/01/1998 to 03/01/2005 in ProQuest Research Library |
| from 01/01/2004 to 1 year ago in Academic Search Premier |
| from 2005 to 06/30/2008 in PubMed Central |
| from 02/01/1998 to present in Academic Search Premier |
| from 01/01/2002 to present in ScienceDirect Health & Life Sciences College Edition |
| from 03/27/2006 to 05/20/2008 in Academic OneFile |
| from 09/01/2001 to present in Health Source: Consumer Edition and MasterFILE Premier |
| from 06/01/1998 to 09/17/1998 in LexisNexis Academic |
| from 01/01/2005 to present in Business Source Premier |
| from 06/21/1990 to 08/14/1991 in LexisNexis Academic (selected full-text only) |
| from 02/20/1990 to present in LexisNexis Academic (selected full-text only) |
| from 08/05/2002 to 04/28/2003 in General OneFile |
| from 12/01/2007 to present in Academic OneFile |
| from 09/01/2002 to 03/01/2003 in General OneFile |
| from 07/01/2000 to present in Academic OneFile and General OneFile |
| from Current year to present in Bergen Community College Print Titles |
| from 01/01/1996 to present in Academic OneFile and General OneFile |
| from 10/01/1996 to present in Academic Search Premier, Health Source: Consumer Edition and MasterFILE Premier |
| from 10/01/1997 to present in ProQuest Research Library |
| from 07/01/1997 to 18 months ago in Academic Search Premier |
| from 02/01/2001 to 06/29/2006 in LexisNexis Academic |