John Freeman, Untitled: From Chickasaw Series. (Grimes Manufacturing), (1970), Colored and black felt-tip pen on vellum, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34938

John Freeman, Untitled: From Chickasaw Series. (Grimes Manufacturing), (1970), Colored felt-tip pen on vellum, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34947

John Freeman, Untitled: From Muskhogee System. (Westinghouse), 1970, Colored and black felt-tip pen on vellum, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34961