TY  - GEN
AU  - Grotzinger, John P.
AU  - Jordan, Thomas H.
TI  - Understanding earth [7th ed.]
SN  - 9781464138744
U1  - 551 
PY  - 2014///
CY  - New York
PB  - W. H. Freeman Company
KW  - Geology
KW  - Earth sciences
KW  - Geology -- Problems
ER  -