1952
United States. Air Force
1:500k
1951
1956
Shell Oil Company
1:824k
1858
Colton, J. H.
1:507k
1856
Whitman, E.B.
1:510k
1857
1895
United States. War Department
1:634k
1867
Mitchell, D.T.
1:589k
1861
Gunnison, J.W.
1:760k
