Pablo Picasso, Head of a Woman, spring 1909, Gouache, watercolor, and black and ochre chalks, manipulated with stump and wet brush, on cream laid paper, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/53111

Pablo Picasso, Seated Female Nude, summer 1909, Watercolor and gouache, over graphite, on tan wove paper, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/79377

Pablo Picasso, Portrait of Fernande Olivier, 1906, Drypoint with plate tone on copper in black on ivory laid paper, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/41433

Pablo Picasso, Two Nudes, Standing, fall 1906, Graphite, with stumping, on cream laid paper, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/51364

Juan Gris, Still Life, 1916, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33870

Juan Gris, Drawing for Mouchoir de Nuages, 1925, Pen and ink on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/14346

Juan Gris, Glass, Siphon and Checkerboard, 1917, Charcoal, with stumping on cream laid paper, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/82027

Juan Gris, Still Life with Bottle and Funnel, 1911, Charcoal on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36672

Juan Gris, Portrait of Max Jacob, 1919, Pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33741

Pablo Picasso, Studies of a Rooster, c. 1896, Colored chalk on beige antique laid paper, Harvard Art Museums, Cambridge. https://dartabase.art/cite/harvard/5361

Pablo Picasso, Fernande Olivier, summer 1906, Charcoal, with stumping, on cream laid paper, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/75420

Juan Gris, Glass and Bottle, 1913, Ink, gouache, watercolor, crayon, and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/34512

Juan Gris, Breakfast (Le Petit déjeuner), 1914, Gouache, oil, and crayon on cut-and-pasted printed paper on canvas with oil and crayon, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35572

Pablo Picasso, Woman with a Helmet of Hair, 1904, Gouache on tan wood pulp board, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/68414

Juan Gris, Compotier and Bottle, 1917, Conté crayon and charcoal on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36126

Juan Gris, Portrait of Pablo Picasso, January–February 1912, Oil on canvas, Art Institute of Chicago, Chicago. https://dartabase.art/cite/aic/8624