08/1977-02/1983
08/1977-08/1984
08/1977-04/1981
12/1979-08/1984
08/1980-04/1981
12/1979-04/1981
04/1979-08/1984
04/1981-08/1984
04/1981-02/1983
08/1977-04/1982
(7708-7904)BU2#,HU30,JU20,RU2# ; (7904- )BU2#