Keywords: stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite monochrome outdoor black and white Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River, viewed from the east side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River, viewed from the east side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. |