100 Years: A Tradition of Social and Political Art on the Lower East Side, Group Exhibition Curated by Anton Van Dalen with Martin Wong, David Wojanrowicz, Keith Haring, Lee Quinones, PPOW, Folded Card with Handwritten Note by Van Dalen, 1988

Group Exhibition with Martha Rosler, Henry Chalfant, Michael Roman, Group Material, Hans Haacke, Ray Johnson, Bob Thompson, Weegee, Jacob Riis. The inside of the card features a written note by Anton Van Dalen the curator of the exhibition to Keith Christensen, who participated in the exhibition.

Size: 5.5 x 8.5 inches