1937
USGS (U.S. Geological Survey)
1:125k
1927
USGS (U.S. Geological Survey)
1:125k
1919
USGS (U.S. Geological Survey)
1:125k
1910
USGS (U.S. Geological Survey)
1:125k
1913
USGS (U.S. Geological Survey)
1:125k
1907
USGS (U.S. Geological Survey)
1:125k
1927
[Washington, D.C. : U.S. Geological Survey]
1:125k
1930
U. S. Geological Survey
1:125k
1977
Alpha, Tau Rho
1955
Hayden Map Co.