| from 11/01/2002 to present in MasterFILE Premier, Middle Search Plus and MAS Ultra - School Edition |
| from 01/01/1997 to 1 year ago in Academic Search Premier |
| from 01/01/1999 to 1 year ago in Academic Search Premier |
| from 01/03/1998 to present in ProQuest Newsstand (Complete) |
| from 04/11/2001 to 10/02/2002 in Business Source Corporate and MasterFILE Premier |