1969, Cleveland Ohio: Remembrance Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1969, Cleveland Ohio: registration Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1969, Cleveland Ohio: committee Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: organisation Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: publicity Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: registration Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: recognition Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: Publicity Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: Planning Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: Financial Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: General corespondence Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: General corespondence Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: visit report Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: publicity Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: planning Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: planning Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: planning Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: planning Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: publicity Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
1971 Salt Lake City: general correspondence Math Eitemau Uwchlwytho gan The Welsh North American Association (WNAA)
