Dunbar, C. O. (1960). Historical geology (2ª ed.). John Wiley and Sons.
Tohutoru Kātū ChicagoDunbar, Carl O. Historical Geology. 2ª ed. New York: John Wiley and Sons, 1960.
Tohutoro MLADunbar, Carl O. Historical Geology. 2ª ed. John Wiley and Sons, 1960.
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