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The Church in Italy in the Fifteenth Century: The Birkbeck Lectures, 1971, by Denys Hay (PETER PARTNER) 155-160 DOI:10.2307/
43628444
Unity, Heresy and Reform 1378-1460. The Conciliar Response to the Great Schism. (Documents of Medieval History 3), by C. M. D. Crowder (DERMOT FENLON) 155 DOI:10.2307/
43628443