Aretino (页面存档备份,存于互联网档案馆) Another Titian portrait of Aretino, at the FrickCollection (页面存档备份,存于互联网档案馆) I Modi - Illustrations by various artists based on
ISBN 978-0-85661-135-3. Friedmann, Herbert. Birds Collected by the Childs Frick Expedition to Ethiopia and Kenya County. Part 2.—Passeres. Smithsonian Institution
Metropolitan Museum of Art Libraries Bashford Dean archives collection (页面存档备份,存于互联网档案馆) at the Frick Art Reference Library - Center for the History of Collecting