Dyfyniad APA

Society of Economic Geologists. (1929). Economic Geology Vol.23, Nos.1-8.

Dyfyniad Arddull Chicago

Society of Economic Geologists. Economic Geology Vol.23, Nos.1-8. Economic Geology Publishing Co, 1929.

Dyfyniad MLA

Society of Economic Geologists. Economic Geology Vol.23, Nos.1-8. 1929.

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