TY  - BOOK
AU  - Birendra Bahadur Singh 
TI  - R. Gupta's guide to environmental sciences: a comprehensive book for UGC-NET, UPSC, IFS, banking and other recruitment and entrance examinations 
SN  - 9788178128597
U1  - 333.7 
PY  - 2011///
CY  - New Delhi
PB  - Ramesh Publishing House
KW  - Environmental science
ER  -