Abstract in English

References used

Andersen V., P. Nival & R.P.Harris; ١٩٨٧– Moddelling of a planctonic ecosystem in an enclosed water column. J. Mar.Biol. Ass. U. K
Fresnel J. (١٩٨٦). Nouvelles observations sur une coccolithacee rare: Crusiplacolithus neohelis. Protistologica

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