Não informado. (2020). Special Reports on the Mineral Resources of Great Britain. H. M. Stationery Office.
Citace podle Chicago (17th ed.)Não informado. Special Reports on the Mineral Resources of Great Britain. London: H. M. Stationery Office, 2020.
Citace podle MLA (8th ed.)Não informado. Special Reports on the Mineral Resources of Great Britain. H. M. Stationery Office, 2020.
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