TransliterationDevekin V.N., Belyakova L.D., Rozen E.V. Govori po-nemecki!: Posobie po razvitiju navykov ustnoj rechi. In Russian
In EnglishDevekin in.H., Belyakov a.D., Rosen E.in. Govori the-German!: manual the development skills oral speech. In Russian, n/a
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