Ehlers, Victor Marcus, Municipal and rural sanitation, by Victor M. Ehlers and Ernest W. Steel. - 4th ed. - New York, McGraw-Hill, 1950. - xi, 548 p. illus. 24 cm. Subjects--Topical Terms: Public health.Rural health.Sanitary engineering.Sanitation. Dewey Class. No.: 628.7 / EHL