British Museum (Natural History). Dept. of Mineralogy & Smith, W. C. (1949). Guide to the collection of rocks (2nd ed.). Printed by order of the Trustees of the British Museum.
Citace podle Chicago (17th ed.)British Museum (Natural History). Dept. of Mineralogy a Walter Campbell Smith. Guide to the Collection of Rocks. 2nd ed. London: Printed by order of the Trustees of the British Museum, 1949.
Citace podle MLA (8th ed.)British Museum (Natural History). Dept. of Mineralogy a Walter Campbell Smith. Guide to the Collection of Rocks. 2nd ed. Printed by order of the Trustees of the British Museum, 1949.
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