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3. Ozone toxicology;Stokinger, E.G.;Arch Environ Health,1965
4. Carbon monoxide hazard in the CO2 welding process;DeKretser, A.J.; Evans, W.D.; Waldron, H.A.;Ann Occup Hyg,1964
5. Some news on welding and welders;Challen, P.J.R.;J Soc Occup Med,1974