| Citation | Cosel, R.V., J. Doerjes and U. Muehlenhardt-Siegel 1982 The American jackknife clam Ensis directus (Conrad) in the German Bight. 1. Zoogeography and taxonomy in comparison with the native jacknife and razor clams. Senckenbergiana maritima 14:147-173. |
| DOI / ISBN | |
| Paper URL | |
| Ref. No. | 80347 |
| Language | English |
| Usage | used in part |
| Remarks | |
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