Bibliography
- 1955
- Klipstein, August. The Graphic Work of Kathe Kollwitz. New York: Galerie St. Etienne, 1955.
- 1993
- "Expressionism featuring Käthe Kollwitz." Scholastic Art 24 (December 1993/January 1994): cover.
- 2002
- Knesebeck, Alexandra von dem. Käthe Kollwitz. Werkverzeichnis der Graphik. 2 vols. Bern: Kornfeld, 2002.