TY  - BOOK
AU  - Tiwari ,Vijay Kumar
TI  - A Textbook of Environmental Studies 
SN  - 9788184886405
U1  - 333.707 
PY  - 2014///
CY  - Mumbai : 
PB  - Himalaya Publishing House, 
KW  - Biosphere
KW  - Ecology
KW  - Economics
KW  - Hydrosphere
ER  -