Material in the public domain. No restrictions on use.
Creative Commons License
This work has been identified with a Creative Commons Public Domain Mark 1.0.
Gow, James E. and Tilton, John L.
"Geology of Adair County,"
Iowa Geological Survey Annual Report:
Vol. 27: p. 277-344.
Available at: http://ir.uiowa.edu/igsar/vol27/iss1/8