Theodore Roszak, Study for Spectre of Kitty Hawk, 1944–45, Watercolor, ink, and gouache on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36482

Theodore Roszak, Study for Spectre of  Kitty Hawk, 1946, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34056