Rhif Cyf AmgBMSS/25735
TeitlMap illustrating the geology of the district between Towyn and Abergynolwyn in South Merionethshire, by Ralph Morris Jehu, B.Sc., of University College, Aberystwyth
Dyddiadn.d.
Disgrifiad FfisegolLinen; col'd; scale - 3 inches : 1 mile
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