TY  - BOOK
AU  - Cobban,William A.
ED  - United States
TI  - New and little-known ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the western interior of the United States
U1  - 564.530978 
PY  - 1971///.
CY  - Washington: 
PB  - United States Government Printing Office, 
KW  - Ammonoidea
KW  - West (U. S.)
KW  - Paleontology
KW  - Cretaceous
N1  - Includes bibliographical references (p. 20-22) and (p. 23-24)
N2  - A species each of Anisoceras, Desmoceras, Tragodesmoceras, Calycoceras, Nigericeras, and Paracompsoceras, (new genus) is descriped and illustrated
ER  -