Installation view of Shift and (r) Learning Strata, by Robert Smithson, Dwan Gallery, New York, N.Y., March 1969 Identification on verso (typed): Robert Smithson, Installation Shot, March 1969, left - Shift, right - Learning Strata, flat white paint/folded steel
Robert Smithson Shift and (r) Leaning Strata, 1968 / unidentified photographer. Dwan Gallery (Los Angeles, California and New York, New York) records, 1959-circa 1982, bulk 1959-1971. Archives of American Art, Smithsonian Institution.
Current copyright status is undetermined
Archives of American Art, Smithsonian Institution Washington, D.C. 20560