08/1977-08/1984
08/1977-04/1982
08/1977-02/1983
04/1981-08/1984
08/1977-04/1981
11/1979-04/1981
11/1979-08/1984
(7708- )JU20,RU20..ST ; (7708- )BU20,30..T1,T2,VSG,VSP