TY  - BOOK
AU  - Charles,Brother H.
AU  - 
AU  - Guevara, Rosa.
AU  - 
TI  - Environmental biology
U1  - 577  E614 1972 
PY  - 1972///
CY  - Manila
PB  - United Publishing Company
KW  - Environmental biology
N1  - Includes glossary and index
ER  -