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1gan Trethowan, Illtyd, 1907-Location: Paul Bechtold Library, Catholic Theological Union
Cyhoeddwyd 1952
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2gan Hilton, Walter, d. 1396Awduron Eraill: “...Trethowan, Illtyd, 1907-...”
Cyhoeddwyd 1975
Location: University Libraries of CUA, Catholic University of America
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3gan Blondel, Maurice, 1861-1949Awduron Eraill: “...Trethowan, Illtyd, 1907-1993...”
Cyhoeddwyd 1964
Location: Hesburgh Libraries, University of Notre Dame
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