Klassen V. Elementy teorii flotatsii kamennykh ugley./Klassen B. Elements of the theory of flotation of hard coal. In Russian (ask us if in doubt) - landofmagazines.com

TransliterationKlassen V. Elementy teorii flotatsii kamennykh ugley.

In EnglishKlassen B. Elements of the theory of flotation of hard coal. In Russian (ask us if in doubt)

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