614.7
C457E
           Chanlett, Emil T
               Environmental production \ Emil T Chanlett - New York : McGraw-Hill, 1973.
               xvi, 569p. - McGraw hill series in water resources and Environmental engineering/ ed by Ven Te Chow .
                ISBN: 0-07-010520-0

87122
                Subjects: Environmental engineering; Environmental health; Sanitation; Water pollution-Prevention and control.