BIOTIC References
880Hummel, H. & Bogaards, R.H., 1989. Changes in the reproductive cycle of the cockle Cerastoderma edule after disturbance by means of tidal manipulation. In Proceedings of the 23rd European Marine Biology Symposium, School of Biological Sciences, University of Wales Swansea, 5-9 September 1988. Reproduction, Genetics and Distribution of Marine Organisms, (ed. J.S. Ryland & P.A. Tyler), p.133-136. Denmark: Olsen & Olsen.
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