Called Caucasian Tatars in Soviet Census until 1939

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Modern Azerbaijani people and other Muslim groups living in Transcaucasia (South Caucasian Tatars), called Caucasian Tatars in Soviet Census until 1939

Is there any source supporting this part "called Caucasian Tatars in Soviet Census until 1939" ? I checked Soviet Census and there are no mention of "Caucasian Tatars". A b r v a g l (PingMe) 15:43, 29 August 2022 (UTC)Reply