1951
1:48k
1978
1:24k
1978
1:24k
1902
1:125k
1902
U. S. Geological Survey
1:125k
1878
Snyder, Van Vechten & Co.
1:210k
1990
1:100k
1897
League of American Wheelmen, Wisconsin Division
1:253k
1940
U.S. Dept. of Agriculture Bureau of Soils
1:191k
1959
1:250k