Swansea 1974: invitation and acceptance Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
"Salt Lake City 1971 Gymanfa Director" Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
Toronto 1973: general correspondence Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
Toronto 1973: meeting minutes Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
