Bolton, R.L. Sewage treatment: basic principles and trends: by R.L Bolton and L. Klein. - 2nd ed. - London: Butterworth & Co. (Publishers) Ltd., 1971 - 256 p.: ill.; 22cm Includes index. ISBN: 0408347805 Subjects--Topical Terms: Sewage treatment. Dewey Class. No.: 628.3 BOL