1. See, inter alia, Claringbold, P. J., and Biggers, J. D., J. Endocrin., 12, 9 (1955). Lerner, I. M., “Genetic Homeostasis” (Oliver and Boyd, Edinburgh, 1954). Livesay, E. A., Genetics, 15, 17 (1930). Maynard Smith, J., and Maynard Smith, S., J. Genetics, 52, 152 (1954). McLaren, A., and Michie, D., J. Genetics, 54, 440 (1956). Robertson, F. W., and Reeve, E. C. R., Z. indukt. Abstamm.- u. Vererb.-lehre, 86, 424 (1955).
2. Shultz, F. T., Biometrics, 9, 336 (1953).
3. Yoon, C. H., Genetics, 40, 297 (1955).