A piece of stiff cardboard published in conjunction with the installation of Walter De Maria's sculpture "Bed of Spikes" shown at Dawn Gallery, New York City, March 29 - April 23, [1969]. Text on card reads, "WALTER DE MARIA / Bed of Spikes, 1968 / Stainless Steel / 16 in. high x 7 ft. long x 3 1/2 ft. wide."