TY  - BOOK
AU  - Duggal, K. N
TI  - Elements of environmental engineering
SN  - 9788121915472
U1  - 628 DUG 
PY  - 2002///
CY  - New Delhi
PB  - S. Chand & Co
KW  - Environmental engineering
KW  - Environmental management
KW  - Environmental sciences
N1  - Includes index
ER  -