1. Inhaled particles and their fate in the lungs;Parkes,1982
2. Chemical agents;Sheppard,1988
3. Non-neoplastic disorders due to metallic chemical and physical agents;Parkes,1982
4. NIOSH recommendations for Occupational Health Standards;National Institute for Occupational Safety and Health;MMWR,1983
5. The long-term effects of exposure to nitrous fumes;Becklake;Am Rev Tuberc,1957