TY  - BOOK
AU  - Marshak, Stephen
TI  - Essentials of geology
U1  - 550 M352E(5) 
PY  - 2016///
CY  - New York
PB  - W W Norton
N1  - 3193 20/07/2018 RBP18/71843 06/08/2018 Main Budget
ER  -