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.
Kay, George F.
"Some Large Bowlders in the Kansan Drift of Southern Iowa,"
Iowa Geological Survey Annual Report:
Vol. 27: p. 345-354.
Available at: http://ir.uiowa.edu/igsar/vol27/iss1/9