Lyell, C. (2001). The Student's elements of geology. Electric Book Co..
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Dyfyniad Arddull Chicago
Lyell, Charles. The Student's Elements of Geology. London: Electric Book Co., 2001.
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Dyfyniad MLA
Lyell, Charles. The Student's Elements of Geology. Electric Book Co., 2001.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.