JOHN PIPER, RECENT WORK, Catalogue d’exposition, New York, Buchholz Gallery / Curt Valentin, 1950, 17 X 12 cm, non-paginé, illustrations JOHN PIPER, Catalogue d’exposition, New York, Curt Valentin Gallery, 1955, 17 X 12 cm, non-paginé, illustrations (10531 EV)
