Author: BEGG, J.L.
Title: Some new species of Proetidae and Otarionidae from the Ashgillian of Girvan.
Description: 1939. The Geological Magazine Vol. LXXVI, No. VIII; pp. 372-382, 1 plt. h.t. Orig. journal's printed covers with faint libr. stamp, spine taped, very good.

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