1. James, T. W., Ann. Rev. Microbiol., 15, 27 (1961).
2. Maaløe, O., in The Bacteria, 4, chapter 1 (Academic Press, London and New York, 1963).
3. Cold Spring Harbor Symp. Quant. Biol., 26 (1961).
4. Holden, J. T., ed., in Amino Acid Pools (Elsevier Publishers Inc., New York, 1962).
5. Dawson, P. S. S., thesis, Univ. Saskatchewan (1964).