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
(7803-8008)BU25,RU25 ; (8008-8204)BU20..WT..ARL,