Results of spirit leveling in Alabama, 1911
Bulletin / U.S. Geological Survey ;
Bulletin (Geological Survey (U.S.)) ;
Marshall, R. B. (Robert Bradford), 1867-1949.
Smith, Eugene Allen, 1841-1927.
Geological Survey (U.S.)
Geological Survey of Alabama.
R.B. Marsahll, Chief Geographer.