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1994
D. L. Lofgren, Harris, D. L., Stewart, T. S., Anderson, D. D., Schinckel, A. P., and Einstein, M. E., Genetic progress of the US Yorkshire breed., Proceedings of the World Congress on Genetics applied to Livestock Production, vol. 17. Genetics and breeding of dairy and beef cattle, swine and horses, pp. 425–428, 1994. (220.5 KB)
1986
T. S. Stewart, Harris, D. L., Schinckel, A. P., and Lofgren, D. L., A bioeconomic objective for swine improvement., Proceedings of the World Congress on Genetics applied to Livestock Production, vol. X. Breeding programs for swine, poultry, and fish., pp. 87–92, 1986. (1.68 MB)
A. P. Schinckel, Harris, D. L., Stewart, T. S., and Lofgren, D. L., Swine testing and genetic evaluation system for the purebred swine associations., Proceedings of the World Congress on Genetics applied to Livestock Production, vol. X. Breeding programs for swine, poultry, and fish., pp. 98–109, 1986. (4.14 MB)