Author: BEGG, J.L.
Title: Hypostomes of some Girvan trilobites and their relationship to te cephala.
Description: 1943. Geological Magazine Vol. LXXX, No. 2; pp. 56-65 & p. 160, 1 plt. h.t. Orig. extract with journals printed covers, faint libr. stamp in corner of front cover, very good.

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