1952
United States. Air Force
1:500k
1952
United States. Air Force
1:500k
1895
United States. War Department
1:634k
1929
Ford Motor Company
1:500k
1899
Walcott, Charles D.
1:500k
1902
Fitch, Charles H.
1:500k
1890
Mitchell, Samuel Augustus
1:1m
1886
Mitchell, Samuel Augustus
1:1m
1880
Mitchell, Samuel Augustus
1:2m
1944
United States. Department of Commerce
1:500k