Dyfyniad APA

Cooper, J. D. (1986). A Trip Through Time: Principle Of Historical Geology. Merril Publishing Company.

Dyfyniad Arddull Chicago

Cooper, John D. A Trip Through Time: Principle Of Historical Geology. Merril Publishing Company, 1986.

Dyfyniad MLA

Cooper, John D. A Trip Through Time: Principle Of Historical Geology. Merril Publishing Company, 1986.

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