TY  - BOOK
AU  - Roque, Celso R.
TI  - Earth water air fire: Essays environmentalism
SN  - 971-8577-15-7
AV  - QH 541.13 R66 1990 F 
PY  - 1990///
CY  - Manila
PB  - Kalikasan Press
KW  -  Environmental policy
KW  -  Environmental protection
ER  -