Date Span
29 Dec 1990
1
9 Apr [1981]
1
1 May 1981
1
1 Oct 1986
1
10 Nov 1988
1
11 Jan 1991
1
13 Dec 1988
1
13-14 Oct 1986
1
14 Apr 1988
1
14 Jun 1985
1
15 Nov 1985
1
16 Jun 1986
1
16 May 1981
1
16 Nov 1981
1
17 Apr 1986
1
18 Dec 1981
1
18 Jan 1989
1
1977-1979
1
1989
1
20 Apr 1986
1
23 Dec 1981
1
23 Feb [1981]
1
23 Mar 1985
1
23 Nov 1988
1
25 Apr 1987
1
26 Sep 1986
1
28 Jan 1991
1
29 Aug 1985
1
30 Apr 1982
1
30 Jan 1990
1
30 Nov 1982
1
6 Apr 1986
1
8 Jan 1991
1
8 Nov 1982
1
8 Nov 1988
1
9 Jan 1989
1
Feb 1977-Aug 1978
1