WPMSF Bulletin #33: May 1977
WPMSF
WPMSF
WPMSF Bulletin #34: November 1977
WPMSF Bulletin #35: February 1978
WPMSF Bulletin #36: June 1978
WPMSF Bulletin #37: October 1978
WPMSF Bulletin #38: December 1978
WPMSF Bulletin #39: May 1979
WPMSF Bulletin #40: December 1979
WPMSF Bulletin #4?: October 1981
WPMSF Bulletin #85: December 1985