TY  - BOOK
AU  - Duggall, K. N. 
TI  - Elements of environmental engineering
SN  - 8121915473
U1  - 628 DUG 23
PY  - 1966/// [Reprinted 2000]
CY  - New Delhi : 
PB  - S. Chand & Co., 
KW  - Environmental engineering
N1  - Includes bibliographical references and index
ER  -