Betekhtin A.G. Kurs mineralogii.- Gosudarstvennoe izdatelstvo geologicheskoy literatury 1955g.- 560s /Betekhtin A.G. Course of mineralogy. - State Publishing House of Geological Literature 1955 - 560s - landofmagazines.com

TransliterationBetekhtin A.G. Kurs mineralogii.- Gosudarstvennoe izdatelstvo geologicheskoy literatury 1955g.- 560s

In EnglishBetekhtin A.G. Course of mineralogy. - State Publishing House of Geological Literature 1955 - 560s

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