Great expectorations! The decline of public spitting: lessons for passive smoking?
Chapman
S
S
Department of Public Health and Community Medicine, University of Sydney, Australia.
D015438:Health Behavior; D006293:Health Promotion; D006801:Humans; D011634:Public Health; D016540:Smoking Cessation; D014028:Tobacco Smoke Pollution
D014028:Tobacco Smoke Pollution