TY  - GEN
AU  - Nelson, D. L.
TI  - Textbook of environmental engineering
SN  - 9788123928715 (pbk.)
AV  - TD145 .P43 1985
U1  - 628.219 
PY  - 2016///
CY  - New Delhi
PB  - CBS
KW  - Environmental engineering
N1  - Includes references & index
ER  -