1. and Eds., Single-Cell Protein, The M. I. T. Press, Cambridge, Mass., 1968, particularly p. 122 by P. A. Lachance.
2. Ed., The Closed Life-Suppprt System, NASA SP-134, National Aeronautics and Space Administration, Ames Research Center, Moffett Field, Calif., 1967.
3. Ed., Bioregenerative Systems, NASA SP-165, National Aeronautics and Space Administration, Washington, D.C., 1968.
4. Characteristics of hydrogen bacteria
5. in Advances in Comparative Physiology and Biochemistry, Vol. 2, Ed., Academic Press, New York, 1966, p. 185.