- Blumel, Otto, 1881-1973
- University of Illinois at Urbana-Champaign, University Library
Pictorial. Ownership. 86x116 mm. EX LIBRIS / MAXIMILIAN / ROTHBALLER / [artist's monogram:] OB. Window looking out on landscape; book and cup on ledge. Artist's mark lower right undeciphered.
- 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