1891
Geological Survey (U.S.)
1:63k
1891
Geological Survey (U.S.)
1:63k
1901
Eldridge
1:36k
1879
DENISON, Frederic.
1925
Clegg, Ernest, 1876-1954
1891
Geological Survey (U.S.)
1:63k
1935
State Planning Board
1:161k
1924
Rand McNally and Company
1:136k
1826
DeSilver, Robert
1797
Sotzmann, Daniel Friedrich
1:190k