The Vatican collections : The Papacy and Art (exhibition New York, Metropolitan Museum of Art, 26.2 - 12.6.1983 ; Chicago, The Art Institute of chicago, 21.7 - 16.10.1983 ; San Francisco, The fine Arts Museum, 19.11.1983 - 19.2.1984...[et al]). - O'Neill, John P. (Metropolitan Museum of Art, 1982)