Apr/May 1987 - Oct/Nov 1988
Scope and Content Note
Feb/Mar 1989 - Dec/Jan 1989/1990
Feb/Mar 1990 - Dec/Jan 1990/1991
Feb/Mar 1991 - Oct/Nov 1991
Dec/Jan 1991/1992 - Aug/Sept 1992
Oct/Nov 1992 - June/July 1993
Apr/May 1995 - Dec/Jan 1995-1996
June/July 1994 - Feb/Mar 1995
Aug/Sept 1993 - Apr/May 1994
Feb/Mar 1996 - Oct/Nov 1996
Dec/Jan 1996/1997 - Aug/Sept 1997
Oct/Nov 1997 - Aug/Sept 1998
Oct/Nov 1998 - Jun/Jul 1999
Aug/Sept 1999 - Apr/May 2000
June/July 2000 - Apr/May 2001
June/July 2001 - April/May 2002