Beddard, Frank E. (1902). On some new species of earthworms belonging to the genus Polytoreutus, and on the spermatophores of that genus. Journal of Zoology. 72(3)(article 6): 190-209.
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Beddard, Frank E.
1902
On some new species of earthworms belonging to the genus Polytoreutus, and on the spermatophores of that genus