TY  - BOOK
AU  - Singh, H.R.
TI  - Environmental biology
SN  - 81-219-2476-6
U1  - 574.5 
PY  - 2005/// (rpr 2009)
CY  - New Delhi
PB  - S.Chand
KW  - Zoology
N1  - Includes index
ER  -