Sonia Delaunay, Colored Rhythm, 1953, Gouache and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38196

Sonia Delaunay, Gouache from Art of Today, Masters of Abstract Art (Art d'aujourd'hui, maîtres de l'art abstrait), Album I, 1953 (original executed in 1950), One from a portfolio of sixteen screenprint reproductions, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/31870

František Kupka, An Absolute (Une Absolue) from Art of Today, Masters of Abstract Art (Art d'aujourd'hui, maîtres de l'art abstrait), Album I, 1953 (original executed in 1952), One from a portfolio of sixteen screenprint reproductions, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/31875