1952
United States. Air Force
1:500k
1932
C&GS
1:621k
1859
Petermann, August
1944
United States. Department of Commerce
1:500k
1898
U.S. General Land Office
1:760k
1939
Rand McNally and Company
1:1m
1948
Shell Oil Company
1:1m
1874
Asher & Adams
1:1m
1952
United States. Air Force
1:500k
1934
Leahy, J.F.