1. National Institute of Occupational Safety and Health. National occupational hazard survey, vol 3. Survey analysis and supplemental tables. Washington: USGPO, 1977; DHHS (NIOSH) publication no. 78-114
2. Chronic bronchitis and emphysema;Kilburn,1966
3. Occupational asthma and rhinitis;Salvaggio,1986
4. Pulmonary reactions to miscellaneous mineral dusts, man-made mineral fibers, and miscellaneous pneumoconioses;Brooks,1986
5. Association of Schools of Public Health. A proposed national strategy for the prevention of occupational lung diseases: part 1. 1986; 1-16