TY  - BOOK
AU  - Clark,David L.
AU  - Ethington,Raymond L.
TI  - Conodonts and zonation of the Upper Devonian in the Great Basin / 
U1  - 551.7 CLA E  
PY  - 1967///.
CY  - New York : 
PB  - The Geological society of America, Inc., 
KW  - Conodonts
KW  - Paleontology
N1  - Includes index.
ER  -