| Citation | Siefield, W. 2006 Subphyllum Cephalochordata. Programa De Biodiversidad. |
| DOI / ISBN | |
| Paper URL | |
| Ref. No. | 1453 |
| Language | Spanish |
| Usage | used in part |
| Remarks | |
| Find this reference in | Google Scholar | Scirus | Species used from this reference |
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