To the problem of labor productivity.Vol.3. March 1925

To the problem of labor productivity: Sat.Art.and materials / [ed.F.E.Dzerzhinsky, M.A.Savelyeva and Z.L.Ledder];Centre.UPR.Printing of the East Sciences USSR.- Moscow;Leningrad: B. and.-.I. Ledcery, Z.L. II.Savelyev, M.A. III.Dzerzhinsky, Felix Edmundovich (1877-1926).Electronic Source: PBVol.3: March 1925 - 1925. -176 p.: Tab .. -.Electronic Source: PB