TY  - BOOK
AU  - Ordoñez, Jose A., II.
TI  - Environmental biology
SN  - 971-08-6378-9
AV  - FIL QH 541.2 
CY  - Mandaluyong
KW  - Ecology -- Study and teaching Philippines.
KW  - Environmental sciences -- Philippines
N1  - Includes bibliographical references and index
ER  -