1917
1:20k
1917
Corps of Engineers
1:20k
1918
1:20k
1950
United States. Air Force
1:500k
1950
United States. Air Force
1:500k
1952
United States. Air Force
1:500k
1951
United States. Air Force
1:500k
1951
United States. Air Force
1:500k
1891
Rand McNally and Company
1:507k
1924
Rand McNally and Company
1:1m