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Edward A. Steinhaus, Kenneth M. Hughes, Two Newly Described Species of Microsporidia from the Potato Tuberworm, Gnorimoschema operculella (Zeller) (Lepidoptera, Gelechiidae), The Journal of Parasitology, Vol. 35, No. 1 (Feb., 1949), pp. 67-75
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Steinhaus et al. (1949) studied this question.
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