1. J. Myers, “Algal Culture, from Laboratory to Pilot Plant,” ed. by J. S. Burlew, Carnegie Inst., Washington 600, 1953, p. 37.
2. J. Oswald, “Single-Cell Protein,” ed. by R. I. Mateles and S. R. Tannenbaum, The M. I. T. Press, Cambridge, Massachusetts, 1968, p. 271.
3. “Physiology and Biochemistry of Algae,” ed. by R. A. Lewin, Academic Press, New York, N. Y., 1962 p. 99.
4. I. Shihira and R. W. Krauss, “Chlorella, Physiology and Taxonomy of Forty-one Isolate,” Port City Press, Baltimore, Md. (1963).
5. “Official Method of Analysis of the A.O.A.C.” 10th, ed. by W. Horwitz, A.O.A.C, Washington, D.C, 1965, p. 95, p. 752.