Joel Shapiro, Fingerprint Drawing, (1969), Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35405

Joel Shapiro, [Untitled], (1979), Charcoal on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38347

Joel Shapiro, [Untitled], (1981), Charcoal on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36660

Joel Shapiro, [Untitled], (1988), Charcoal on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36348