January – February 1970
March – April 1970
May – June 1970
July – August 1970
September – October 1970
November – December 1970
February 1971
April 1971
June 1971
August 1971
October 1971
December 1971
Winter 1972
Spring 1972
Summer 1972
Fall 1972
Winter 1973
Spring 1973
Summer 1973
Fall 1973
Winter 1974
Spring 1974
Summer 1974
Fall 1974
Winter 1975
Spring 1975
Summer 1975
Fall 1975
Spring 1976
Summer 1976
Fall 1976
Winter 1977