Identification on verso (typed): Installation Invitational, 1966 Smithson, Steiner, Gordon. Identification on verso (stamped): Please credit Geoffrey Clements photography, 243 East 10th St., New York. Neg. no. 51-175.
Installation of Invitational, 1966 / Geoffrey Clements, photographer. Park Place, The Gallery of Art Research, Inc., and Paula Cooper Gallery records, 1961-2006. Archives of American Art, Smithsonian Institution.
Current copyright status is undetermined
Archives of American Art, Smithsonian Institution Washington, D.C. 20560