DEVRIèS, ANDRé - I. Un cas de commensialisme chez un hemiaster, II. Contribution à l'étude de la symétrie bilatérale chez les spatangues.

1953. BNull. Serv. carte Géol. de l'Algérie (1) Paléont. No. 15; pp. 23-35 & 37-69, 2 fig. 1+10 plts. Orig. extract, plain wrps.

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