The invertebrates platyhelminthes and rhynchocoela, the acoelomate bilateria.
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| Format: | Bog |
| Sprog: | English |
| Udgivet: |
New York
McGraw-Hill
1951.
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| Udgivelse: | 1st ed. |
| Serier: | McGraw-Hill publications in the zoological sciences
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| Fag: |