The three Popes an account of the great schism - when rival Popes in Rome, Avignon and Pisa vied for the rule of Christendom
Gail, Marzieh.
London Hale
1972
Originally published, New York: Simon and Schuster, 1969
Bibliographyp.307-310. - Includes index
Schism, The Great Western, 1378-1417.