Robert Smithson, Yucatan Mirror Displacements (1-9) [detail, image 4], 1969. Nine Kodachrome color slides, variable dimensions. Solomon R. Guggenheim Museum, New York, Purchased with funds contributed by the Photography Committee and with funds contributed by the International Director's Council and Executive Committee Members: Edythe Broad, Henry Buhl, Elaine Terner Cooper, Linda Fischbach, Ronnie Heyman, Dakis Joannou, Cindy Johnson, Barbara Lane, Linda Macklowe, Brian McIver, Peter Norton, Willem Peppler, Denise Rich, Rachel Rudin, David Teiger, Ginny Williams, Elliot Wolk.