Não informado. (2020). Memoirs of the Geological Survey of Great Britain. Her Majesty's Stationery Office.
Chicago-referens (17:e uppl.)Não informado. Memoirs of the Geological Survey of Great Britain. London: Her Majesty's Stationery Office, 2020.
MLA-referens (8:e uppl.)Não informado. Memoirs of the Geological Survey of Great Britain. Her Majesty's Stationery Office, 2020.
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