TY  - BOOK
AU  - Sharma,P.D., x
AU  - x
TI  - Environmental biology: x
SN  - 8171334040
U1  - 577/S531e 
PY  - 1993///
CY  - Meerut
PB  - Rastogi pub
KW  - Environmental biology
KW  - Biology
N1  - Includes
ER  -