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Leon Jacobs, Jack S. Remington, Marjorie L. Melton, A Survey of Meat Samples from Swine, Cattle, and Sheep for the Presence of Encysted Toxoplasma, The Journal of Parasitology, Vol. 46, No. 1 (Feb., 1960), pp. 23-28
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Jacobs et al. (1960) studied this question.
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