Author: COOPER, M.R.
Title: Revision of the Late Valanginian Cephalopoda from the Sundays River Formation of South Africa, with special reference to the genus Olcostephanus.
Description: 1981. Annals of the South African Museum Vol. 83, Part 7; pp. 147-366, 205 fig./plts. Orig. wrps. very good.

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