1960
1:24k
1985
1:100k
1991
1:100k
1952
United States. Air Force
1:500k
1895
United States. War Department
1:634k
1895
United States. War Department
1:634k
1878
Gray, Frank Arnold
1:1m
1865
Colton, G.W.
1:2m
1855
Colton, J. H.
1:1m
1841
Colby, Charles A.
1:1m