Chicago, IL: Museum of Contemporary Art, 1971. First edition. Stiff boards. Exhibition catalog for a show that ran September 10 through October 24, 1971. Essay by Jan van der Marck. Includes numerous black and white and color illustrations. A close to near fine copy in flexible boards with some very slight wear to the top of the spine and some slight soiling to the boards. No dust jacket as issued. Signed by Baj and with a full page drawing by him on the second endpaper. Uncommon thus.