Second Supplement to the Orton Museum Type Catalog

The citation for the second supplement to the catalog of type fossil specimens in the Orton Geological Museum is: 

Marple, M.F., Leutze, W.P., and Schopf, T.J.M. 1964. Second supplement to the catalogue of type fossils in the Orton Museum, The Ohio State University. Columbus, Ohio: Department of Geology, The Ohio State University, 27 p.