TY  - BOOK
AU  - VERMA, P.S
AU  - AGARWAL, V.K
TI  - Environmental biology
SN  - 81-21-0859-0
U1  - EVS.SC 574.5 
PY  - 1983///
CY  - New Delhi
PB  - S.Chand
KW  - ECOLOGY
N1  - Contents Glossary
ER  -