Author: Loydell, D.K., 1992-1993.:
Title: Upper Aeronian and Lower Telychian (Llandovery) graptolites from Western Mid-Wales.
Description: [Mon. Palaeontogr. Soc., 590 & 592.] London. 4to. Pp. iv,180, many photos on 5 pls., many drawings in 26 figs., refs., index. In 2 installments as issued, orig. wrs.

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