Irene Rice Pereira, Red and White Rectangles, 1936, Gouache, pencil, and ink on gray board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34109

Irene Rice Pereira, Exploration with a Pencil, 1940, Pencil, gouache, and metallic paint on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36755