TY  - GEN
AU  - khosla, Reeta, Siddiqui, Zahid H
TI  - Basics of environmental science
SN  - 9788184874013
U1  - 363.7 KHO 
PY  - 2017///
CY  - New Delhi
PB  - Narosa Publishing House Pvt. Ltd.
KW  - Botnay
ER  -