Ellsworth Kelly, Tuileries, 1949, Pencil on lined paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37237

Ellsworth Kelly, Study for Window, Museum of Modern Art, Paris, 1949, Ink and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37225

Ellsworth Kelly, Apples, 1949, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37268