TY  - BOOK
AU  - Singh, Y.K.
TI  - Environmental science
SN  - 8122418481
U1  - 577 
PY  - 2006///
CY  - New Delhi: 
PB  - New Age International Ltd. Publishers, 
KW  - Biodiversity
KW  - Ecosystems
KW  - Human population
KW  - Life science
ER  -