The Silurian System, Founded on Geological Researches in the Counties of Salop, Hereford, Radnor, Montgomery, Caermarthen, Brecon, Pembroke, Monmouth, Gloucester, Worcester, and Stafford : With Descriptions of the Coalfields and Overlying Formations /
doi 10.5962/bhl.title.88029
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Date
January 1, 1839
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John Murray, Albemarle Street,