Peter Brüning, [Untitled], 1966, Crayon and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37592

Peter Brüning, [Untitled], 1966, Felt-tip pen, crayon, colored pencil, gouache, and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37597

Peter Brüning, [Untitled], (n.d.), Colored pencil and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37289