1952
United States. Air Force
1:500k
1932
C&GS
1:621k
1944
United States. Department of Commerce
1:500k
1891
Rand McNally and Company
1:507k
1876
Colton, G.W.
1:2m
1924
Rand McNally and Company
1:1m
1931
Clason Map Company
1:2m
1874
Asher & Adams
1:1m
1875
Asher & Adams
1:1m
1950
United States Post Office Department
1:2m