1. Wright, J. W. 1978. Introduction to Forest Genetics. Academic Press, New York.
2. Zobel, B. J., and Talbert, J. 1984. Applied Forest Tree Improvement. J. Wiley & Sons, New York.
3. Namkoong, G. 1979. Introduction to Quantitative Genetics in Forestry. Tech. Bull. No. 1588, USDA Forest Service.
4. Namkoong, G., Kang, H. C, and Brouard, J. S. 1988. Tree Breeding: Principles and Strategies. Springer-Verlag, New York. See especially pages 103–115 and 132–149.
5. Gittins, R. 1985. Canonical Analysis. A Review with Applications in Ecology. Springer-Verlag, New York.