
1969
Robert Morris, Vibrations, 1969. Lithograph, sheet (Irregular): 22 1/4 × 29 15/16 in. (56.5 × 76 cm) Image: 20 × 28 in. (50.8 × 71.1 cm). Whitney Museum of American Art, New York; purchase 70.27.7. ©Robert Morris/Artists Rights Society (ARS), New York