09/1980-08/1982
09/1980-07/1984
08/1981-07/1984
09/1980-08/1983
08/1982-08/1983
08/1982-07/1984
08/1981-08/1982
07/1981-08/1982
07/1981-04/1985
09/1982-04/1985
(8009- )SED
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