| Citation | Knauss, E.B. and R.M. Rieger 1979 Fine structure of the male reproductive system in two species of Haplognathia Sterrer (Gnathostomulida, Filospermoidea). Zoomorphologie 94:33-48. |
| DOI / ISBN | |
| Paper URL | |
| Ref. No. | 1537 |
| Language | English |
| Usage | used in part |
| Remarks | |
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