Keywords: stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite monochrome outdoor snow black and white Yellowstone National Park, Wyoming. Valley of the Yellowstone River. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. Yellowstone National Park, Wyoming. Valley of the Yellowstone River. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. |