TY  - BOOK
AU  - Dunbar,Carl O.
TI  - Principles of stratigraphy. 3rd ed
U1  - 551.7 
PY  - 0000///57
CY  - NY
PB  - John Wiley
KW  - Petro
KW  - Economic
KW  - Gems
KW  - Geology
KW  - Petrology
ER  -