Não informado. (1839). Memoirs of the Geological Survey of the United Kingdon. Institute of Geological Sciences.
Citace podle Chicago (17th ed.)Não informado. Memoirs of the Geological Survey of the United Kingdon. London: Institute of Geological Sciences, 1839.
Citace podle MLA (8th ed.)Não informado. Memoirs of the Geological Survey of the United Kingdon. Institute of Geological Sciences, 1839.
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