1. “Vinegar Fermentation,” P. 347 in Microbial Technology, Ed., Reinhold (1967).
2. U.S. Patent 1, 449, 108 (1923).
3. Trade Wastes: Its Treatment and Utilization, Charles Griffin and Co., London (1902).
4. “Sewage,” in Encyclopedia Chemical Technology, Vol. 12 p. 199, and Eds., Intersciencc, New York (1954).