Specific differences in the gonadial spicules of Echinus esculentus (Linnaeus) and Psammechinus miliaris (Gmelin)Rawlinson, R. (1932) Specific differences in the gonadial spicules of Echinus esculentus (Linnaeus) and Psammechinus miliaris (Gmelin). Journal of the Marine Biological Association of the United Kingdom, 18 (1). pp. 229-234. Full text available as:
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