TY  - BOOK
AU  - Tiwari, Vijay Kumar.
TI  - A textbook of environmental studies
SN  - 9788184886405
U1  - 333.7 
PY  - 2014///
CY  - Mumbai: 
PB  - Himalaya Publishing House, 
KW  - Child welfare
KW  - Economics
KW  - Ecosystems
KW  - Natural resources
ER  -