May 15, 1979 to March 11, 1980
April 16, 1979 to October 8, 1980
December 4, 1978 to June 14, 1979
December 1, 1978 to April 12, 1979
October 14, 1978 to March 18, 1981
October 14, 1978 to May 15, 1979
October 14, 1978 to May 30, 1979
April 11, 1978 to October 13, 1978
April 11, 1978 to March 6, 1981
April 11, 1978 to January 17, 1980
