TY  - BOOK
AU  - Dunbar, Carl O. 
AU  - Rodgers, John
TI  - Principles of stratigraphy
U1  - 551.7 DDC 21
PY  - 1957///
CY  - New York
PB  - John wiley & sons, inc.
KW  - Geology
KW  - Stratigraphic geology
ER  -