TY  - BOOK
AU  - Marshak,Stephen
TI  - Essentials of geology
SN  - 9780393117790
U1  - 551 M352E3 
PY  - 2009///
CY  - New York
PB  - W. W. Norton and Company
KW  - Geology
KW  - Earth
KW  - Rock groups
KW  - Mineral
KW  - Rock cycle
KW  - Fossils
ER  -