The Rönnskär investigation concerning the incidence of changes in the upper and lower respiratory tract in employees of the Rönnskär smelting works; a preliminary report.
D001980:Bronchi; D006801:Humans; D015994:Incidence; D016272:Occupational Health; D012279:Rickets; D012122:Ventilators, Mechanical
INDUSTRIAL HYGIENE; RESPIRATORS; RICKETS