| from 2001 to present in Ingenta Select |
| from 1994 to 1994 in Periodical Abstracts |
| from 07/06/2002 to present in Health Source: Consumer Edition |
| from 05/13/2002 to present in Newspaper Source |
| from 1991 to 2003 in ABI/INFORM |
| from 1994 to 2003 in Periodical Abstracts |
| from 1997 to 2003 in Wilson Select Full Text Plus |
| from 08/01/2003 to present in Academic Search Elite and Health Source: Nursing/Academic Edition |
| from 2002 to 2003 in Wilson Select Full Text Plus |
| from 1992 to 2003 in ABI/INFORM |
| from 03/01/1990 to present in Academic Search Elite, Business Source Elite, Military & Government Collection and Professional Development Collection |
| from 1991 to 2003 in ABI/INFORM |
| from 1994 to 2003 in Periodical Abstracts and Wilson Select Full Text Plus |
| from 03/01/2000 to 3 months ago in Academic Search Elite and Health Source: Nursing/Academic Edition |
| from 07/01/1996 to 1 year ago in Academic Search Elite |
| from 1994 to 2002 in Periodical Abstracts |
| from 1995 to 2002 in Wilson Select Full Text Plus |
| from 1995 to 2000 in Wilson Select Full Text Plus |
| from 1998 to 2000 in Periodical Abstracts |
| from 2001 to 2001 in Periodical Abstracts |
| from 01/01/1997 to present in Academic Search Elite |
| from 1998 to 2003 in Wilson Select Full Text Plus |
| from 02/12/2002 to present in Newspaper Source |
| from 12/01/2000 to present in Primary Search |
| from 1992 to 2003 in ABI/INFORM |
| from 1991 to 2003 in ABI/INFORM |
| from 1995 to 2003 in Periodical Abstracts |
| from 1999 to 2003 in Wilson Select Full Text Plus |
| from 01/01/1995 to 04/01/1997 in Business Source Elite |
| from 07/01/2001 to present in Academic Search Elite |
| from 1997 to 1999 in Periodical Abstracts |
| from 1993 to 1993 in ABI/INFORM |
| from 2000 to 2003 in ABI/INFORM |
| from 1991 to 1999 in ABI/INFORM |
| from 10/01/1997 to present in Business Source Elite |
| from 1998 to 2003 in Periodical Abstracts |
| from 01/01/1995 to present in Business Source Elite |
| from 05/01/1990 to 07/01/2001 in Academic Search Elite and Health Source: Consumer Edition |
| from 2002 to 2003 in Periodical Abstracts and Wilson Select Full Text Plus |
| from 09/01/2001 to 11/01/2002 in Academic Search Elite and Health Source: Consumer Edition |
| from 02/01/1994 to 07/01/2002 in Business Source Elite |
| from 1991 to 2002 in ABI/INFORM |
| from 1998 to 2003 in Wilson Select Full Text Plus |
| from 1999 to 2003 in Wilson Select Full Text Plus |
| from 1999 to 2003 in Wilson Select Full Text Plus |
| from 1992 to 2003 in ABI/INFORM |
| from 1991 to 2003 in ABI/INFORM |
| from 1995 to 2003 in Periodical Abstracts |
| from 2000 to 2003 in Wilson Select Full Text Plus |
| from 2002 to 2002 in ABI/INFORM |
| from 1998 to 2003 in Wilson Select Full Text Plus |
| from 09/02/1997 to present in Newspaper Source |
| from 07/01/1990 to 12/01/1995 in Academic Search Elite |
| from 1992 to 1995 in Periodical Abstracts |
| from 01/01/1999 to present in Business Source Elite |
| from 01/01/2000 to present in Academic Search Elite and Health Source: Nursing/Academic Edition |
| from 2001 to 2003 in Periodical Abstracts |
| from 1992 to 2003 in ABI/INFORM |
| from 1994 to 2003 in Periodical Abstracts |
| from 1995 to 2003 in Wilson Select Full Text Plus |
| from 01/01/1994 to present in Academic Search Elite, Business Source Elite, Health Source: Nursing/Academic Edition and Professional Development Collection |
| from 2000 to 2002 in ABI/INFORM |
| from 07/01/1997 to 02/01/1998 in Business Source Elite |
| from 01/01/2000 to present in Academic Search Elite and Health Source: Nursing/Academic Edition |
| from 2002 to 2003 in Wilson Select Full Text Plus |
| from 02/01/1999 to 1 year ago in Academic Search Elite and Professional Development Collection |
| from 05/01/1990 to present in Academic Search Elite |
| from 1995 to 2003 in Periodical Abstracts and Wilson Select Full Text Plus |
| from 1997 to 1999 in Periodical Abstracts |
| from 2002 to 2003 in Wilson Select Full Text Plus |
| from 01/01/1985 to 1 year ago in Business Source Elite |
| from 02/01/1956 to 1 year ago in Military & Government Collection |
| from 01/02/1995 to present in Health Source: Consumer Edition and Health Source: Nursing/Academic Edition |
| from 2002 to 2003 in Wilson Select Full Text Plus |
| from 2002 to 2003 in ABI/INFORM |
| from 2003 to 2003 in Wilson Select Full Text Plus |
| from 09/01/1996 to 01/01/1998 in Health Source: Consumer Edition |
| from 01/01/2003 to 1 year ago in Academic Search Elite and Health Source: Nursing/Academic Edition |
| from 01/01/2001 to present in Academic Search Elite |
| from 1997 to 1999 in Periodical Abstracts |
| from 1997 to 2000 in Wilson Select Full Text Plus |
| from 05/01/1998 to present in Academic Search Elite and Professional Development Collection |
| from 07/01/1996 to present in Regional Business News |
| from 09/04/1997 to present in Newspaper Source |
| from 01/01/1990 to 09/01/2001 in Academic Search Elite and Military & Government Collection |
| from 1995 to 2003 in Wilson Select Full Text Plus |
| from 02/01/1998 to 1 year ago in Academic Search Elite |
| from 1998 to 2002 in Wilson Select Full Text Plus |
| from 04/09/1997 to present in Newspaper Source |
| from 11/24/2000 to present in Newspaper Source |
| from 01/01/2003 to present in Academic Search Elite and Health Source: Consumer Edition |
| from 1995 to 2001 in Periodical Abstracts |
| from 07/15/1999 to present in American Chemical Society Web Editions |
| from 1999 to present in American Chemical Society Web Editions |
| from 1997 to 2002 in ABI/INFORM |
| from 2000 to 2003 in ABI/INFORM |
| from 02/01/1990 to 1 year ago in Business Source Elite |
| from 01/01/1985 to present in Business Source Elite |
| from 1992 to 2002 in ABI/INFORM |
| from 01/01/1985 to 11/01/2001 in Business Source Elite |
| from 06/01/1972 to 11/01/2001 in Military & Government Collection |
| from 1992 to 1999 in ABI/INFORM |
| from 1995 to 1999 in Wilson Select Full Text Plus |
| from 2001 to 2002 in ABI/INFORM |
| from 1999 to present in American Chemical Society Web Editions |
| from 09/04/1997 to present in Newspaper Source |
| from 09/01/1999 to present in Academic Search Elite |
| from 1997 to 2003 in Wilson Select Full Text Plus |
| from 01/01/1989 to 1 year ago in Business Source Elite and Military & Government Collection |
| from 01/01/2000 to present in Academic Search Elite and Health Source: Nursing/Academic Edition |
| from 1998 to 2003 in Wilson Select Full Text Plus |
| from 09/01/2001 to present in Health Source: Consumer Edition |
| from 12/01/2001 to present in Health Source: Consumer Edition |
| from 01/01/2002 to present in Health Source: Consumer Edition |
| from 09/01/1998 to present in Academic Search Elite, Health Source: Consumer Edition and Health Source: Nursing/Academic Edition |
| from 1997 to 2002 in Wilson Select Full Text Plus |
| from 01/01/1999 to 02/01/2000 in Academic Search Elite |
| from 1992 to 1999 in Periodical Abstracts |
| from 02/01/2001 to present in Academic Search Elite, Health Source: Consumer Edition and Military & Government Collection |
| from 01/01/1990 to 03/01/2000 in Academic Search Elite and Business Source Elite |
| from 03/01/2001 to present in Health Source: Consumer Edition |
| from 07/01/1993 to present in Business Source Elite |
| from 02/01/1985 to 1 year ago in Business Source Elite |
| from 06/01/1996 to 6 months ago in Academic Search Elite and Business Source Elite |
| from 03/01/1990 to 6 months ago in Academic Search Elite and Professional Development Collection |
| from 1997 to 2000 in Periodical Abstracts |