Rights
Material in the public domain. No restrictions on use.
Recommended Citation
Ladd, Harry Stephen (1928) "The Stratigraphy and Paleontology of the Maquoketa Shale of Iowa, Pt. 1," Iowa Geological Survey Annual Report: Vol. 34: p. 305-440.Available at: http://ir.uiowa.edu/igsar/vol34/iss1/4