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 Date Unknown |
 August 1978 |
 September 1978 |  October 1978 |  November 1978 |
 December 1978 |  January 1979 |  February 1979 |
 March 1979 |  April 1979 |  May 1979 |
 June 1979 |  July & August 1979 |  September 1979 |
 October 1979 |  November 1979 - January 1980 |
