- University of Illinois at Urbana-Champaign, University Library
Pictorial. Ownership. 81x115 mm. EX LIBRIS / DR. RUD ERHARD / [artist's name:] Schreiber. Bearded old man contemplates skull; open book on lectern in background.
- Rare Book and Manuscript Library, University of Illinois at Urbana-Champaign; For more information, please contact the Rare Book and Manuscript Library: https://illinois.edu/fb/sec/7016277