- Murchison, R.I. 1839. 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. London, John Murray
- Part I
- Part II, Organic remains. 579–768 pp. Pl. 1–37. BHL
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