Pat Andrea, Study for Metermaid, 1968, Colored pencil, pencil, and crayon on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35811

Pat Andrea, Study for Laboratory, 1971, Pencil, colored pencil, gouache, and crayon on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35825