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. Hot springs on the Gardner River in the lower basins. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. Yellowstone National Park, Wyoming. Hot springs on the Gardner River in the lower basins. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. |