Note 75 — CHEMICAL EXAMINATION.
Reading edition
Phelps, E. B. A critical study of the methods in current use for the determination of free and albuminoid ammonia in sewage, Public Health Papers and Reports, Am. Pub. Health Assoc., Vol. 29, p. 354, 1904; J. Infect. Dis., Vol. 1, p. 327, 1904.