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