Nonmarine mollusks of late Cretaceous Age from Wyoming, Utah and Colorado.

Bibliographic Details
Main Author:	Yen, Teng-Chien
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Govt. Print. Off, 1954.
Series:	Professional paper (Geological Survey (U.S.)) ; 254-B. Shorter contributions to general geology.
Subjects:	Mollusks, Fossil > Wyoming. Mollusks, Fossil > Utah. Mollusks, Fossil > Colorado. Paleontology > Cretaceous.

Evans: US Documents (Annex 5th floor)