Preliminary geological map of parts of the Alto Pass, Jonesboro, and Thebes Quadrangles, Union, Alexander, and Jackson counties. - Weller, J. Marvin (James Marvin), 1899-; Ekblaw, George E. (George Elbert), 1895-1972; Savage, Thomas Edmund, 1866- (Urbana, Ill., 1940)
At head of title: State of Illinois ... Department of registration and education ... Division of the State geological survey ...
Bibliographical foot-notes.
Keywords: Geology -- Illinois