"The substance of this monograph was presented in a lecture at Dumbarton Oaks in April 1958".
Includes bibliographical references and index.
Electronic text and image data. Ann Arbor, Mich. : University of Michigan, Michigan Publishing, 2006. Includes both TIFF files and keyword searchable text. ([ACLS Humanities E-Book]) ([College Art Association monographs]) Mode of access: Intranet. This volume is made possible by a grant from the Andrew W. Mellon Foundation.