1. Adams, M. H. (1959), “Bacteriophages, ” Interscience Publishers, Inc., New York.
2. Ames, B. N., and Whitfield, H. J. (1966), Cold Spring Harbor Symp. Quant. Biol. 31, 221.
3. Champe, S. P., and Benzer, S. (1962), Proc. Nat. Acad. Sci. 48, 532.
4. Dove, W. F. (1968), Ann. Rev. Genet. 2, 305.
5. Drake, J. W. (1963), J. Mol. Biol. 6, 268.