1851
Bache, A. D.
1:30k
1930
Hoffman, E. A.
1:27k
1947
Sunderland, Clyde H.
1913
U. S. Geological Survey
1:63k
1872
Allardt, G. F.
1:16k
1913
Lawson, Andrew C.
1:63k
1878
Thompson & West
1:32k
1937
DeFoy, Francis
1915
US Geological Survey
1:63k
1945
Lites, Arthur