TY  - BOOK
AU  - Guido, Ryan Manuel D. (et.al.)
TI  - Fundamentals of environmental science
SN  - 971-0412-98-3
U1  - Fil. 363.7 G942 C2015 
PY  - 2015///
CY  - Philippines
PB  - Books Atbp. Publishing Corp
ER  -