ELECTROMYOGRAPHIC RESEARCH OF WORK AT VARIOUS RATES BUT WITHIN ONE RANGE OF POWER by A. I. Nikonorova -- PROBLEMS OF LABOR HYGIENE AND THE HEALTH STATUS OF WORKERS IN AREAS WHERE HIGH-FREQUENCY CURRENTS ARE USED by N. S. Lashchenko, Ye. I. Smurova, T. Z. Rogovaya, S. A. Troitskiy, N. D. Mel'nikova -- CERTAIN EXPERIENCES OF THE IRRADIATION OF MINERS IN PHOTARIES WITH ERYTHEMAL LAMPS by Yu. D. Zhilov.
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