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Soliman, G.N., Mansour, N.S. & El-Assal, F.M. On the infra specific variations in the frequency of supernumerary testes inSchistosoma mansoni . Z. Parasitenkd. 70, 561–564 (1984). https://doi.org/10.1007/BF00926699
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DOI: https://doi.org/10.1007/BF00926699