On the Spermatophores in Earthworms of the Genus Pheretima (=Perichaeta)
Beddard, Frank E. (Frank Evers), 1858-1925
Article
1911
Proceedings of the Zoological Society of London
412--420
BioStor
English
London Academic Press, [etc.] 1833-1965
BioStor: https://biostor.org/reference/107543 DOI: https://doi.org/10.1111/j.1096-3642.1911.tb01939.x