René Magritte, Perspective, (1963), Crayon on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36809

René Magritte, The Thought Which Sees, 1965, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35714

Gerd Leufert, [Untitled], 1963, Pencil on newsprint, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/38421

Enrique Brinkmann, Procession, 1962, Ink and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33713

Pierre Alechinsky, Outside James' Showcase, 1968, Ink on mulberry paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/32969

Pablo Picasso, The Pool, January 30, 1968, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34830

Eduardo Chillida, Around the Void II (Alrededor del vacio II), 1965, Forged steel, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/93444

Antonio Saura, Crucifixion, 1960, Collage and ink on black paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33329

Eduardo Chillida, [Untitled], (1966), Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33342

Antonio López García, The Staircase, 1967, Pencil and wax on paper on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34492

Marisol (Marisol Escobar), [Untitled], 1960, Crayon and cut-and-pasted paper on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34057

Pablo Picasso, [Untitled], 1969, Ballpoint pen on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35587

Antonio Saura, Señorita, 1960, Gouache and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37185

Pablo Picasso, Figures, 1967, Ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36254

Pierre Alechinsky, Vanished in Smoke, 1962, Distemper, ink, gouache and watercolor on paper on canvas, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33616

Pierre Alechinsky, One Day, the Night, 1960, Ink on transparentized paper on canvas, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37867

Pierre Alechinsky, The Complex of the Sphinx, 1967, Synthetic polymer paint, oil, and ink on Japanese paper on canvas, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37446