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Dyfyniad Arddull ChicagoO'Donnell, John Hugh. Mother of Mercy. Washington, D.C.: National Council of Catholic Men, 1946.
Dyfyniad MLAO'Donnell, John Hugh. Mother of Mercy. National Council of Catholic Men, 1946.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.