Date Span
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7 Jun 1984
1
8 Jan 1987
1
9 Jul 1985
1
9 Jun 1987
1
Apr 1984-Nov 1989
1
Aug 1986-Feb 1988
1
Dec 1986-Jul 1987
1
Jan 1986-May 1987
1
Jan-Aug 1988
1
Jun 1983-Jun 1984
1
Jun-Jul 1983
1
Mar 1981-Jan 1991
1
May 1979
1
May-Jun 1983
1
Nov 1981-Aug 1984
1
Nov 1985
1
Oct 1991-Sep 1994
1
[1964]
1
[1970]
1
[1983-1987]
1
[1985]
1
[1986]
1
[1988-1990]
1
[Apr-Aug 1989]
1
[Aug-Oct 1988]
1
[Jan 1988-Feb 1990]
1
[Jan-Apr 1983]
1
[May 1986-Mar 1987]
1
n.d.
1