TY  - BOOK
AU  - Asthana, D K
TI  - Textbook Of:Environmental Studies: For Undergraduate students 
SN  - 9788121927642
U1  - 577.07 
PY  - 2006///
CY  - New Delhi
PB  - S Chand & Company
KW  - GENERAL STACK
KW  - Natural sciences and mathematics
KW  - Life sciences Biology
KW  - Ecology
KW  - Environmental studies
ER  -