Silurian system.
Murchison, Sir Roderick Impey. *£.140.10 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 coal-fields and overlying for- mations. London. Murray. 1839. xxxii, 768 pp. Illus. Plates. Maps. 4°. The large detached map is kept on No. 1 in *E.Cab.14.10.
D5326 - Great Britain. @ secrecy. - Silurian system.