CALLAHAN, HARRY. Harry Callahan * Harry Callahan, 38th Venice Biennial. Together, 2 volumes. Each handsomely illustrated with reproductions of Callahan's photographs. Small 4tos, boards and photo-pictorial wrappers, the former with a photo-pictorial dust jacket, both soiled; price-clipped and price stickers. first editions. New York: The Museum of Modern Art, 1967; International Exhibitions Committee of the American Federation of Arts, 1978