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. Grand Canyon of the Yellowstone. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. |