EBSEES: 2 hits for Russia, USSR, Russia (Federation) / Nationalities, Minorities / Volga Tatars

The European Bibliography of Slavic and East European Studies (EBSEES) collects books, journal articles, reviews and dissertations from Eastern Europe (former countries of Eastern Bloc) which were published in Belgium, Germany, Finland, France, Great Britain, the Netherlands, Austria and Switzerland from 1991 to 2007. The segment "Literature" and "Culture" of the European Bibliography of Slavic and East European Studies contains 18.000 bibliographic entries (from the total asset of 85.000). More information can be found here.

Your search for Russia, USSR, Russia (Federation) / Nationalities, Minorities / Volga Tatars provides 2 hits
1	Post-Soviet nation-state building: an inqiry into anti-Russian nationalism of small nations in transition - Belarusians, Volga Tatars, and Chechens Winderl, Thomas, Wien, Univ., Diss., 1997, 230 p
2	Volga Tatars, Russians and the Russian state at the turn of the nineteenth century: relationships and perceptions [Emel'janova] Yemelianova, Galina M, in: Slavonic and East European Review, 77(3), 1999, p. 448-84

The European Bibliography of Slavic and East European Studies (EBSEES) - 1991-2007

Post-Soviet nation-state building: an inqiry into anti-Russian nationalism of small nations in transition - Belarusians, Volga Tatars, and Chechens

Volga Tatars, Russians and the Russian state at the turn of the nineteenth century: relationships and perceptions