Note 9 — CHEMICAL EXAMINATION.
Reading edition
Dibdin, W. J. The purification of sewage and water, 3d ed., pp. 345–51, D. Van Nostrand Co., New York, 1903.
Reading edition
Dibdin, W. J. The purification of sewage and water, 3d ed., pp. 345–51, D. Van Nostrand Co., New York, 1903.