Description Izvestiya of the People's Commissariat of Labor of the USSR. - Officer. ed. -Moscow: B. and., 1932. - . Source of the electronic copy: PB 1924 No. 30. August 14: Year 3. - [International (39) type. MNHH "Mospoligraf"], 1924. -16 p. ; 30000. - Bibliography. in a substring. note . Source of the electronic copy: PB Publisher [Интернациональная (39) тип. МСНХ "Мосполиграф"]
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