Lucebert, The Centipede, 1965, Gouache and pasted paper on gray paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34509

Willem de Ridder, Paper Flux Work, late 1960s, Offset printed cards in envelope, Harvard Art Museums, Cambridge. https://dartabase.art/cite/harvard/4676

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