Palharya, J.P.. Environmental impact of sewage and effluent disposal on the river systesm / J.P. Palharya, Shobha Malviya, V.K. Siriah. - New Delhi : Ashish Publishing House , 1993. - 8? ,179p. : ills.,figs.,maps,photos,tables ; 24cm. . NULL ISBN: 8170245400 Rs.300.00 Subjects--Index Terms: WATER POLLUTION Dewey Class. No.: 577.64 / PAL/E