Author: Hutt, J.E., 1974-1975.:
Title: The Llandovery graptolites of the English Lake District. [Mon. Palaeontogr. Soc., 540 & 542.]
Description: London 1974-1975. 4to, 28cm. Pp. viii,137, numerous photos on 26 plates, refs. Orig. printed wrappers, in 2 part as issued.

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