| Citation | Colwin, L.H., A.L. Colwin and D.E. Philpott 1957 Electron Microscope Studies of Early Stages of Sperm Penetration in Hydroides hexagonus (Annelida) and Saccoglossus kowalevkii (Enteropneusta). Journal of Cell Biology 3:489-502. |
| DOI / ISBN | |
| Paper URL | |
| Ref. No. | 1313 |
| Language | English |
| Usage | not used yet |
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