Author: Sherlock, R.L., 1926.:
Title: A correlation of the British Permo-Triassic rocks. Part 1. North England, Scotland and Ireland.
Description: Proc. Geol. Assoc., 37: pp. 10-72, 2 pls. of column. sections, 2 figs., refs. Offprint, orig. wrs. Two stamps on front cover (one of Prof. G.A.F. Molengraaff).

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