Keywords: stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite outdoor monochrome black and white Yellowstone National Park, Wyoming. Camp by a lake in the woods. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. Yellowstone National Park, Wyoming. Camp by a lake in the woods. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. |