
1977
Robert Irwin, Slant Park Slanting Grass Planes 52nd thru to 53rd Street, Open Project Proposal, 1976, 1977. Pen and ink, transfer type, collage and graphite pencil on paper, sheet: 24 × 34 3/4 in. (61 × 88.3 cm). Whitney Museum of American Art, New York; gift of the artist 77.47. ©Robert Irwen/Artists Rights Society (ARS), New York