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1990
R. D. Crawford, Actual situation and problems in conservation policy and practice in North America., vol. XIV. Dairy cattle genetics and breeding, adaptation and conservation., pp. 455–458, 1990. (1.27 MB)
R. D. Crawford, Conservation and management in poultry science and practice., vol. XIV. Dairy cattle genetics and breeding, adaptation and conservation., pp. 484–487, 1990.
1982
R. D. Crawford, Status of rare and feral domestic animal stocks in Canada and the United States., Proceedings of the World Congress on Genetics applied to Livestock Production., vol. 6. Round tables, pp. 107–116, 1982. (2.29 MB)