Special Reports On the Mineral Resources of Great Britain. Memoirs of the Geological Survey. - VOL. XIX: Lead and Zinc Ores in the Carboniferous Rocks of North Wales. By Bernard Smith, M.A. pp. iv + 162, with 3 plates and 25 figures. 1921. Price5s. 6d.net. - VOL. XXI: Lead, Silver-Lead, and Zinc Ores of Cornwall, Devon, and Somerset. By Henry Dewey. pp. iv + 72, with 4 plates and 14 figures. 1921. Price 2s. 6d. net. - VOL. XXII: The Lead and Zinc Ores of the Lake District. By T. Eastwood, pp. iv + 56, with 1 plate and 4 figures. 1921. Price 2s. net.
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Memoirs of the Geological Survey. Special Reports on the Mineral Resources of Great Britain. Vol. 30: Copper Ores of the Midlands, Wales, the Lake District and the Isle of Man
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