Jan Lebenstein, Axial Figure, 1961, Felt-tip pen on paper on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33172

Tony Urquhart, Summer Forms I, 1961, Oil and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36643

Zbigniew Makowski, [Untitled], 1964, Watercolor and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38583

Tony Urquhart, Forest Floor, II, 1961, Oil and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36640

Rodolfo Abularach, [Untitled], 1960, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33940

Zbigniew Makowski, [Untitled], 1964, Watercolor and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37655

Zbigniew Makowski, [Untitled], 1965, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38584

Jan Lebenstein, Figure, 1962, Gouache, watercolor, and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37823

Andrzej J. Wroblewski, Instrument #3, 1962, Colored ink and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37075

Jan Lebenstein, Axial Figure, 1960, Watercolor, ink, and ballpoint pen on graph paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37821

Rodolfo Abularach, [Untitled], 1964, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37406

Jan Lebenstein, Axial Figure, 1960, Felt-tip pen on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36323