Author: GEYS, JORIS F.
Title: Hemicidaroid echinoids from the Upper Cretaceous deposits in the Wadi Qena-area (estern desert, Egypt.
Description: 1989. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre Vo. 59; pp. 127-135, 5-14, 1 fig. 1 plt. Orig. extract, stapled, very good, 4to.

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