bottom left by later hand in green pencil: Schiefler I S.2, Nr 2; bottom center verso by later hand in graphite: [partially erased] )23-6
- Modern German Prints and Drawings from the Kainen Collection, National Gallery of Art, Washington, DC, 2014.
- Dube, Annemarie and Wolf-Dieter Dube. E.L. Kirchner; das graphische Werke. Munich: Prestel-Verlag, 1967, no. (W) 10