Conodont biostratigraphy and depositional history of strata comprising the Niagaran sequence (Silurian) in the northern part of the Cincinnati Arch region, west-central Ohio, and evolution of Kockelella walliseri (Helfrich)
M. A. Kleffner
1994
Article
Journal of Paleontology
68(1):141-153
Find it at:
http://dx.doi.org/10.1017/S002233600002566X