TY  - GEN
AU  - Sengar, R.S
AU  - Kumar, Amit
TI  - Environment science question bank: a handbook for competitive  examinations
SN  - 9789386478276
U1  - R 333.7 
PY  - 2017///
CY  - New Delhi
PB  - CBS Publishers
KW  - UGC-CSIR, NET/JRF/SET
KW  - Environment science
KW  - Life science
ER  -