Dyfyniad APA

Society of Economic Geologists. (1949). Economic Geology vol.44, Nos.1-8.

Dyfyniad Arddull Chicago

Society of Economic Geologists. Economic Geology Vol.44, Nos.1-8. Society of Economic Geologists, 1949.

Dyfyniad MLA

Society of Economic Geologists. Economic Geology Vol.44, Nos.1-8. 1949.

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