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William J. Foreyt, A. C. Todd, The Occurrence of Fascioloides magna and Fasciola hepatica Together in the Livers of Naturally Infected Cattle in South Texas, and the Incidence of the Flukes in Cattle, White-Tailed Deer, and Feral Hogs, The Journal of Parasitology, Vol. 58, No. 5 (Oct., 1972), pp. 1010-1011
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Foreyt et al. (1972) studied this question.
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