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1Cyhoeddwyd 1983“...International Congress of Genealogical and Heraldic Sciences...”
Rhif Galw: IV R 17:15,3.1982Trafodyn Cynhadledd Llyfr -
2Cyhoeddwyd 1983“...International Congress of Genealogical and Heraldic Sciences...”
Rhif Galw: IV R 17:15,2.1982Trafodyn Cynhadledd Llyfr -
3Cyhoeddwyd 1983“...International Congress of Genealogical and Heraldic Sciences...”
Rhif Galw: IV R 17:15,1.1982Trafodyn Cynhadledd Llyfr