TY  - BOOK
AU  - Gurucharan Sing, 
TI  - Pollution to purity of environment / 
SN  - 81-7629-236-2
U1  - 577.27 
PY  - 2005///
CY  - New Delhi
PB  - Deep & Deep
KW  - Effects of human on ecology
KW  - Ecology
KW  - Life sciences
N1  - Includes index
ER  -