Naoto Nakagawa, Big Table, 1967, Pencil and colored pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33244

Naoto Nakagawa, This Side of the Room, 1967, Pencil, colored pencil, and metallic paint on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33260