Rao, M. N. Waste water treatment/ M. N. Rao and A. K. Datta. - 2nd ed. - New delhi: Oxford & IBH publishing, c1987. - viii, 345p.: 22 cm. Includes index. English ISBN: 8120402154 Subjects--Topical Terms: Waste water Dewey Class. No.: 628.119/RAW