WPMSF Bulletin #12: Spring 1969
WPMSF
WPMSF
WPMSF Bulletin #13: Autumn 1969
WPMSF Bulletin #14: Winter 1970
WPMSF Bulletin #15: Spring 1970
WPMSF Bulletin #16: Winter 1971
WPMSF Bulletin #17: Spring 1971
WPMSF Bulletin #18: December 1971
WPMSF Bulletin #19: Spring 1972
WPMSF Bulletin #20: Autumn 1972
WPMSF Bulletin #21: December 1973