00992cam a22002891 4500 gs 41000069 DLC 20260227111346.0 790621s1941 nyuaf b 000 0 eng c gs 41000069 (OCoLC)5092773 U.S. Geol. survey. Library NIC OCoLC DLC premarc QE801 .K44 564.1 Schoonover, Lois Margaret. A stratigraphic study of the mollusks of the Calvert and Choptank formations of southern Maryland ... by Lois Margaret Schoonover. Ithaca, N.Y., Paleontological research institution, 1941. 134 p. 12 pl., fold. tab. 25 cm. Bulletins of American paleontology, v. 25, no. 94B Thesis (Ph. D.)--Bryn Mawr college, 1940. Vita. Bibliography: p. 107-110. Mollusks, Fossil. Paleontology Miocene. Paleontology Maryland. 27717 27717