1. The host factor in bronchitis;Orie, N.G.M.; Sluiter, H.J.; de Vries, K.; Tammeling, G.J.; Witkop, J.,1960
2. Occupational health services for farmers: a study based on an experiment in 1979-83. Publications of the Social Insurance Institution, Finland A: 21;Vohlonen, I.; Husman, K.; Kalimo, E.; Nuutinen, J.; Tupi, K.; Virolainen, R.;Thorax; 4Ciba Guest Symposium. Terminology, definitions, and classification of chronic pulmonary emphysema and related conditions,1985
3. American Thoracic Society. Definitions and classification of chronic bronchitis, asthma and pulmonary emphysema;Am Rev Respir Dis
4. Cardiovascular survey methods;Rose, G.A.; Blackburn, H.;Geneva: World Health Organization,1968
5. Respiratory disease in England and the United States;Holland, W.W.; Reid, D.D.; Seltser, R.; Stone, R.W.;Arch Environ Health,1965