TY  - BOOK
AU  - Tiwari, Manoj 
AU  - Khulbe, Kapil & Tiwari, Archana 
TI  - Environmental studies / 
SN  - 9788188237821
U1  - 333.7 TIW 
PY  - 2007///
CY  - New Delhi : 
PB  - I.K International Publishing House Pvt. Ltd. ,	
N1  - Includes references and index
ER  -