TY  - GEN
AU  - Sharma, P. D.
TI  - Environmental biology
SN  - 81-7133-619-1 :
U1  - 574.5 
PY  - 2002///-2003
CY  - Meerut
PB  - Rastogi publications
KW  - ECOLOGY
N1  - Includes appendix, glossary and index
ER  -