Keywords: stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite monochrome black and white Views among the Rocky Mountains of Colorado. View among the rocks of Pleasant Park, near Larkspur. Douglas County, Colorado. 1874. (Stereoscopic view similar to Jackson, W.H. 1072) Views among the Rocky Mountains of Colorado. View among the rocks of Pleasant Park, near Larkspur. Douglas County, Colorado. 1874. (Stereoscopic view similar to Jackson, W.H. 1072) |