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1Bằng Turner, James, 1946-“...Charles and Margaret Hall Cushwa Center for the Study of American Catholicism...”
Được phát hành 1997
Location: Hesburgh Libraries, University of Notre Dame
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2Bằng Allitt, Patrick“...Charles and Margaret Hall Cushwa Center for the Study of American Catholicism...”
Được phát hành 1994
Location: U.S. Catholic Special Collection, University of Dayton
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