TY  - BOOK
AU  - Duggal, K. N.
TI  - Elements of Environmental Engineering
SN  - 8121927927
U1  - 628 22
PY  - 1966///
CY  - New Delhi
PB  - S. Chand, 1966
KW  - Environmental engineering
N1  - Includes bibliographical references (p.422-423) and index
ER  -