References
- Department of Health, Education, and Welfare. Smoking and health: a report of the Surgeon General. Washington, DC: Public Health Service, 1979. (DHEW publication No. 79–50066)
- Stewart RD. The effects of low concentrations of carbon monoxide in man. Scand J Respir Dis (Suppl) 1974:91:56–62
- Bridge DP, Corn M. Contribution to the assessment of exposure of non-smokers to air pollution from cigarette and cigar smoke in occupied spaces. Environ Res 1972;5:192–209
- White JR, Froeb HF. Small-airways dysfunction in nonsmokers chronically exposed to tobacco smoke. N Engl J Med 1980:302:720–3