Robert Michel, Blériotomobil, 1921, Watercolor and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38304

Robert Michel, [Untitled], 1924, Cut-and-pasted colored paper on board with watercolor, gouache, ink, and pencil, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38282

Robert Michel, Another Study of Alexander (Noch eine Alexander Studie), 1926, Pencil, ink, and gouache on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36513

Robert Michel, Rendez-vous, 1930, Cut-and-pasted gelatin silver print on paper with ink, colored ink, watercolor, paint, metallic paint, and linen tape on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38284

Robert Michel, From X to Y (Von X nach Y), 1936, Pencil, ink, and watercolor on paper on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38286