TY  - BOOK
AU  - University of the Philippines (Diliman). Institute for Science and Mathematics Education Development
TI  - Earth science: the Philippines in focus
SN  - 971-135-068-8
PY  - 1993///
CY  - Quezon City
PB  - Institute for Science and Mathematics Education Development
KW  - Earth sciences
KW  - sears
ER  -