Books by Harry C. Koenig:
Books in the extended shelves:
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Koenig, Harry C. (Harry Corcoran), 1909-2002: Principles for peace; selections from papal documents, Leo XIII to Pius XII (National Catholic welfare conference, 1943), also by Catholic Church. Pope and National Catholic Welfare Conference. Bishops' Committee on the Pope's Peace Points (page images at HathiTrust)
Find more by Harry C. Koenig at your library, or elsewhere.