Dines, Henry George (1956); BGS - Regional Memoirs - Metalliferous Mining Region of South West England Vol1, The; 567 pages
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Various (1920); BGS - Mineral Resources of GB (c1920s) Vols XIV, XV, XVI, XVII, XVIII - Fireclay; Arsenic & Antimony Ores; Refactory Materials, Lead & Zinc of Scotland, Rock-Salt and Brine (5 books); 777 pages