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W. Okazaki, A. M. Fadly, L. B. Crittenden, W. B. Chase, The Effectiveness of Selection for Reduced Avian Leukosis Virus Shedding in Different Chicken Strains, Avian Diseases, Vol. 26, No. 3 (Jul. - Sep., 1982), pp. 612-617
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Okazaki et al. (1982) studied this question.
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