Mango Languages 
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Provides online conversational foreign language instruction including a variety of resources to help patrons learn practical conversation skills for languages spoken all around the world. Offers language learning programs for many of the world s most popularly spoken languages. The Basic modules comprise lessons in introductory level polite conversation. The Complete modules comprise additional lessons to achieve an intermediate conversation level.
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Bolʹshoĭ tolkovyĭ slovarʹ russkogo i︠a︡zyka : sovremennai︠a︡ redakt︠s︡ii︠a︡
Oxford Russian Dictionary by 
Oxford Russian Dictionary by 