Exhibition catalogue published in conjunction with show held at the Philadelphia Museum of Art, September 22 - November 11, 1973. Traveled to The Museum of Modern Art, New York, December 3, 1973 - February 10, 1974; and The Art Institute of Chicago, March 9 - April 21, 1974. Curated by Anne d'Harnoncourt and Kynaston McShine, with an essay by Anne d'Harnoncourt. Includes checklist of the exhibition.