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Dyfyniad Arddull ChicagoRyan, J. S. Medical Aspects of Marriage. Rev. ed. Dublin: Clonmore and Reynolds, 1957.
Dyfyniad MLARyan, J. S. Medical Aspects of Marriage. Rev. ed. Clonmore and Reynolds, 1957.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.