1880
Bolitho, Edwin
1872
Wheeler, G.M.
1:507k
1872
Wheeler, G.M.
1:507k
1872
Wheeler, G.M.
1:507k
1861
Beckwith, E.G.
1:760k
1868
Layne, J.P.
1:24k
1870
King, Clarence
1:21k
1869
Wheeler, G.M.
1:760k
1879
Geographical and Geological Survey of the Rocky Mountain Region (U.S.)
1:127k
1879
Geographical and Geological Survey of the Rocky Mountain Region (U.S.)
1:317k