|Stereographs project |
Issued "Kroll's Stereoscop-bilder"; "stereoscopical pictures for the use of squint-eyed people", boxed set of 20 colored drawings for treating strabismus, CR 1929. Pub. by Leopold Voss, Leipzig, with notes by Dr. R. Perlia, Crefeld. Some of his images were used by Dr. Wells in the U.S. in his set created for eye treatments.
T.K. Treadwell & William C. Darrah (Compiled by), Wolfgang, Sell (Updated by), 11/28/2003, Photographers of the World (Non-USA), (National Stereoscopic Association)
|Credit: National Stereoscopic Association with corrections and additions by Alan Griffiths and others.|
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