Ingeborg Andreasen-Lindborg, Little Girl Sewing, n.d., etching; sight 5 3/8 x 3 1/8 in. (13.7 x 7.9 cm), Smithsonian American Art Museum, Washington, D.C. https://dartabase.art/cite/smithsonian/ld1-1643381040022-1643381049323-0

Ingeborg Andreasen-Lindborg, Little Peasant Girl, n.d., etching; sight 8 3/4 x 6 in. (22.2 x 15.2 cm), Smithsonian American Art Museum, Washington, D.C. https://dartabase.art/cite/smithsonian/ld1-1643381040022-1643381049324-0

Melchior Lorch, Albrecht Durer, 1550, engraving, National Gallery of Art, Washington. https://dartabase.art/cite/nga/8647

Melchior Lorch, Martin Luther, 1548, engraving, National Gallery of Art, Washington. https://dartabase.art/cite/nga/8648

Ingeborg Andreasen-Lindborg, Lola, 1920, drypoint; sight 8 1/2 x 6 3/4 in. (21.6 x 17.1 cm), Smithsonian American Art Museum, Washington, D.C. https://dartabase.art/cite/smithsonian/ld1-1643381040022-1643381049324-1

František Kupka, An Absolute (Une Absolue) from Art of Today, Masters of Abstract Art (Art d'aujourd'hui, maîtres de l'art abstrait), Album I, 1953 (original executed in 1952), One from a portfolio of sixteen screenprint reproductions, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/31875