Oswald, N.C. (1958). Recent Trends in Chronic BronchitisLloyd-Luke.
2.
Reid, Mca. Lynne (1958). The pathology of chronic bronchitis OSWALD, N. C. Recent Trends in Chronic Bronchitis (1958). p. 26.
3.
Davies, C.N. (1960). Deposition of dust in the lungs: a physical process KING, E. J. and FLETCHER, C. M. eds. Industrial Pulmonary Diseases . Churchill. (1960). p. 44.
4.
Greenwald, I. (1954). Effects of inhalation of low concentrations of sulphur dioxide upon man and other mammalsArch. indust. Hyg. & occup. Med.10, 455.
5.
Amdur, Mary O. (1959). The physiological response of guinea pigs to atmospheric pollutantsInt. J. Air Poll.1, 170.
6.
College Of General Practitioners (1961). Chronic bronchitis in Great Britain: a national surveyBrit. med. J.2, 973.