[On the classification of occupational hazards (based on an article by D. A. Zil'ber)].
D000062:Accidents, Occupational; D004781:Environmental Exposure; D006801:Humans; D009784:Occupational Diseases / Q000145:classification*
O klassifikatsii professional'nykh vrednosteĭ. (Po povodu stat'i D. A. Zil'bera)