Não informado. (2020). Memoirs of the Geological Survey of Great Britain. Her Majesty's Stationery Office.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Memoirs of the Geological Survey of Great Britain. London: Her Majesty's Stationery Office, 2020.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Memoirs of the Geological Survey of Great Britain. Her Majesty's Stationery Office, 2020.
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