1. Huxley, J. (1949).Soviet Genetics and World Science, Chatto and Windus, London.
2. Rao, D. C., Morton, N. E., and Yee, S. (1974). Analysis of family resemblance. II. A linear model for familial correlation.Am. J. Hum. Genet. 26:331?359.
3. Jencks, C. (1972).Inequality, Basic Books, New York.