TY  - BOOK
AU  - Dunbar, Carl O
AU  - Rodgers, John
TI  - Principles of stratigraphy
U1  - 551.7 DUN 
PY  - 1958///.
CY  - New York : 
PB  - John Wiley and Sons, 
KW  - Geology, Stratigraphy
ER  -