TY  - BOOK
AU  - Cobban,William A.
ED  - Geological Survey (U.S.)
TI  - Tarrantoceras stephenson and related ammonoid genera from cenomanian (upper cretaceous) rocks in Texas and the western tnterior of the United States
U1  - 564.53 
PY  - 1988///
CY  - Washington
PB  - United States Government Printing Office
KW  - Ammonoidea
N1  - Includes bibliographical references
ER  -