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Datus M. Hammond, Bill Chobotar, John V. Ernst, Cytological Observations on Sporozoites of Eimeria bovis and E. auburnensis, and an Eimeria Species from the Ord Kangaroo Rat, The Journal of Parasitology, Vol. 54, No. 3 (Jun., 1968), pp. 550-558
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Hammond et al. (1968) studied this question.
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