TY  - BOOK
AU  - S. Peavy, Howard
AU  - R. Rowe, Donald \ Tchobanoglous, George
TI  - Environmental engineering / Howard S. Peavy...[et al.]
SN  - 0-07-049134-8
U1  - 628 P546e 
CY  - Singapore : McGraw-Hill
KW  - 1.WATER PURIFICATION PROCESSES IN NATURAL SYSTEMS
ER  -