Stereo-Fotografie, um 1906- '''Stereo-Fotografie, um 1906'''.
* Quelle: http://hdl.loc.gov/loc.pnp/cph.3b47084 - Digital ID: cph 3b47084
* Lizenz: This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright.
