below image, in graphite, at left: Probedruck; below image, in graphite, at center: Modell; below image, in graphite, at right: Nesch
(R.E. Lewis, San Francisco, CA); Ruth Kainen, Washington, D.C., purchased January 17, 1970; Gift to NGA, 2012.
- Modern German Prints and Drawings from the Kainen Collection, National Gallery of Art, Washington, DC, 2014.
- Helliesen, Sidsel and Bodil Sorensen. Rolf Nesch, The Complete Graphic Works. Milan, Italy, 2009: no. 343, only