Dyfyniad APA

Elsner, H. (2010). Assessment Manual: Heavy Minerals of Economic Importance. Federal Institute for Geosciences and Natural Resources (BGR).

Dyfyniad Arddull Chicago

Elsner, Harald. Assessment Manual: Heavy Minerals of Economic Importance. Hannover: Federal Institute for Geosciences and Natural Resources (BGR), 2010.

Dyfyniad MLA

Elsner, Harald. Assessment Manual: Heavy Minerals of Economic Importance. Federal Institute for Geosciences and Natural Resources (BGR), 2010.

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