Kummel, B. History of the earth an introduction to historical geology. Freemn and Co..
Chicagoスタイル(17版)引用形式Kummel, Bernhard. History of the Earth an Introduction to Historical Geology. Freemn and Co..
MLA(8版)引用形式Kummel, Bernhard. History of the Earth an Introduction to Historical Geology. Freemn and Co..
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