Rome tradition, innovation and renewal : a Canadian international art history conference 8 - 13 June 1987, Rome ; in honour of Richard Krautheimer on the occasion of his 90th birthday and Leonard Boyle O. P., Prefect of the Biblioteca Apostolica Vaticana - Boyle, Leonard E. 1923-1999; Goering, Joseph Ward 1947-; Reynolds, Roger 1934- (1991)