TY  - BOOK
AU  - Duggal,K.N,
TI  - Elements of Environmental Engineering
SN  - 8121915473
U1  - 628 
PY  - 2010///
CY  - New Delhi
PB  - S. Chand
KW  - Sanitary & municipal engineering
KW  - Civil Engineering
KW  - Elements of Environmental Engineering
ER  -