Francis, G. G. (1881). The smelting of copper in the Swansea district of South Wales: From the time of Elizabeth to the present day (2d ed.). H. Sotheran & co..
Citace podle Chicago (17th ed.)Francis, George Grant. The Smelting of Copper in the Swansea District of South Wales: From the Time of Elizabeth to the Present Day. 2d ed. London and Manchester: H. Sotheran & co., 1881.
Citace podle MLA (8th ed.)Francis, George Grant. The Smelting of Copper in the Swansea District of South Wales: From the Time of Elizabeth to the Present Day. 2d ed. H. Sotheran & co., 1881.
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