Recommendation R 9: International System for the Transliteration of Slavic Cyrillic Characters. International Organization for Standardization In pages 13–18. ISO, Genève, 2nd edition, 1968.
bibtex   
@incollection{international_organization_for_standardization_recommendation_1968,
	address = {Genève},
	edition = {2nd},
	title = {Recommendation {R} 9: {International} {System} for the {Transliteration} of {Slavic} {Cyrillic} {Characters}},
	isbn = {92-67-10058-0},
	publisher = {ISO},
	author = {{International Organization for Standardization}},
	year = {1968},
	pages = {13--18}
}

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