TY  - BOOK
AU  - Lianko, Aurora A.
TI  - Introduction to earth science
SN  - 971-574-035-9
AV  - FIL QE 26.3  
CY  - Quezon City
KW  - Earth sciences -- Study and teaching
KW  - Earth sciences
N1  - Includes bibliographical references and index
ER  -