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L. Margolis, G. W. Esch, J. C. Holmes, A. M. Kuris, G. A. Schad, The Use of Ecological Terms in Parasitology (Report of an Ad Hoc Committee of the American Society of Parasitologists), The Journal of Parasitology, Vol. 68, No. 1 (Feb., 1982), pp. 131-133
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Margolis et al. (1982) studied this question.
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