June 01, 1986
April 09, 1981
September 25, 1981
March 01, 1983
June 01, 1985
July 01, 1986
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March 28, 1987
February 01, 1989
March 01, 1989
November 01, 1989
November 01, 1990
December 01, 1989
June 05, 1991
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October 01, 1990