Guthrie, G. M. (1994). Geology of the Columbiana area, Chilton, Coosa, and Shelby counties, Alabama. Geological Survey of Alabama, Environmental Geology Division.
Chicago-viite (17. p.)Guthrie, Gregory M. Geology of the Columbiana Area, Chilton, Coosa, and Shelby Counties, Alabama. Tuscaloosa, Ala. (P.O. Box O, Tuscaloosa, 35486-9780): Geological Survey of Alabama, Environmental Geology Division, 1994.
MLA-viite (8. p.)Guthrie, Gregory M. Geology of the Columbiana Area, Chilton, Coosa, and Shelby Counties, Alabama. Geological Survey of Alabama, Environmental Geology Division, 1994.
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