TY  - BOOK
AU  - Singh , Pratap
AU  - Rathore, N.S.
TI  - Environmental studies
SN  - 81-7906-069-1
U1  - 628.01 
PY  - 2004///
CY  - New Delhi
PB  - Himanshu publications
N1  - Includes bibliographic reference; Ahuja book co
ER  -