Richard Mortensen, [Untitled], c. 1940–45, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33565

Richard Mortensen, [Untitled], c. 1940–45, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33570

Richard Mortensen, [Untitled], 1940, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33575

Richard Mortensen, [Untitled], c. 1940–45, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33579