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H. G. Purchase, C. H. Cunningham, B. R. Burmester, Genetic Differences among Chicken Embryos in Response to Inoculation with an Isolate of Infectious Bronchitis Virus, Avian Diseases, Vol. 10, No. 2 (May, 1966), pp. 162-172
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Purchase et al. (1966) studied this question.
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