Gray, N. F. Water technology : an introduction for scientists and engineers / N. F. Gray - London : Arnold, c1984. - xi, 548 p. : ill. ; 25 cm. ISBN: 0340676450 LCCN: Subjects--Topical Terms: Water quality managementSewage disposalFreshwater biology LC Class. No.: TD365 / .G73 1984 Dewey Class. No.: 628.1 / G781w