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 Beware: scanned document.                References

Barnes, R. 1980. Invertebrate Zoolpgy. Philadelphia:Saunders Company. pp. 309-311.
Cheng, T. 1973· General Parasitology. New York: Academic Press. PP· 54~5-563-
Cleave, H. 1952. Speciation and Formation of Genera in Acanthocephala. Systematic Zoology. Vol. 1, No. 2.
Hyman, L. 1951. The Invertebrates: Acanthocephala, Aschelminthes, and Entoprocta. Vol. 3. New York: McGraw Hill. pp.459-531.

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