Reed, Sherwood C. Natural systems for waste management and treatment / Sherwood C. Reed, Ronald W. Crites, E. Joe Middlebrooks - 2nd ed. - New York : McGraw-Hill, 1995 - xi, 433 p. ; 23 cm. Includes index ISBN: 0070609829 Subjects--Topical Terms: Sewage--Purification--Biological treatmentSewage sludge--Management