Keywords: stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite monochrome outdoor mountain landscape mountainside black and white Yellowstone National Park, Wyoming. Basins of hot springs on the Gardner River. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. Yellowstone National Park, Wyoming. Basins of hot springs on the Gardner River. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. |