TY  - BOOK
AU  - Duggal, K.N. ;
TI  - Elements of environmental engineering
SN  - 9788121915472 
U1  - 628 
PY  - 2002/// (2004 reprinting)
CY  - Ram Nagar, New Delhi
PB  - S. Chand, 
KW  - Environmental engineering
KW  -  Buildings -- Environmental engineering.
KW  - Sewage -- Environmental aspects
N1  - Included Index
ER  -