TY  - BOOK
AU  - Singh, Y. K
TI  - Environmental science
SN  - 9788122418484
U1  - 363.700954 SIN 
PY  - 2006///
CY  - New Delhi
PB  - New Age international ( P) Limited, Publishers
KW  - Environmental education -- India
KW  - Environmental sciences -- India
KW  - Human ecology -- India
ER  -