Betekhtin A.G., Ershov S.P., Zverev V.N i dr. Kratkiy kurs mestorozhdeniy poleznykh iskopaemykh./Betekhtin A.G., Ershov S.P., Zverev V.N et al. Short course of mineral deposits. In Russian (ask us if in doubt) - landofmagazines.com

TransliterationBetekhtin A.G., Ershov S.P., Zverev V.N i dr. Kratkiy kurs mestorozhdeniy poleznykh iskopaemykh.

In EnglishBetekhtin A.G., Ershov S.P., Zverev V.N et al. Short course of mineral deposits. In Russian (ask us if in doubt)

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