- Leningrad Council of National Economy.Central Scientific and Technical Library.Instructions on the procedure for eliminating outdated, unnecessary and domestic domestic and foreign literature from technical libraries of enterprises and institutions of the SovieRhoz system of the Leningrad Economic Administrative Area.Leningrad: Central Bureau of Scientific and Technical Information, 1958.THE USSR.People's Commissariat for the construction of heavy industry enterprises.Letter to the director of the Leningrad Construction Technical School from the head of the Bureau of Inventions of Levochkin on the need to subscribe to the TEXCO file, published by the ITEIN of the State University of February 11, 1946, No. 30619. February 11, 1946.THE USSR.People's Commissariat for Construction.Invention Bureau.A letter to the director of the Leningrad Construction Technical School from the head of the Bureau of Inventions of the People's Commissariat of Leochkin, on the direction of the TEXCO Card Avenue, published by the ITEIN, for registration of a subscription, November 27, 1945, No. 30661. November 27, 1946.
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