1886
Geological Survey (U.S.)
1:63k
1858
Walling, Henry Francis, 1825-1888
1:51k
1898
Geological Survey (U.S.)
1:63k
1890
Geological Survey (U.S.)
1:63k
1886
Geological Survey (U.S.)
1:63k
1890
Geological Survey (U.S.)
1:63k
1883
Watson, Walter, civil engineer
1:134k
1883
Watson, Walter, civil engineer
1:134k
1854
Woodford, E. M
1:20k
1829