The topographic maps of the United States" and key to standard symbols on verso., Relief shown by contours and spot heights., Surveyed in 1942., 1927 North American datum., N4500-W11000/15.,
The topographic maps of the United States" and key to standard symbols on verso., Relief shown by contours and spot heights., Surveyed in 1937, 1938, and 1940., 1927 North American datum., N4500--W11015/15., The forty-fifth degree parallel is the prescribed position of the Montana-Wyoming boundary. Withi...,
"The topographic maps of the United States" and key to standard symbols on verso., Relief shown by contours and spot heights., Forested areas overprinted in green., Surveyed in 1937, 1938, and 1940., 1927 North American datum., N4500--W11015/15., The forty-fifth degree parallel is the prescribed position of the Montana-Wyoming boundary. Withi...,
