The smoking habits of male industrial workers.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D005191:Family Characteristics; D005260:Female; D005387:Finland; D006801:Humans; D008297:Male; D008875:Middle Aged; D009787:Occupational Medicine; D009790:Occupations; D012907:Smoking / Q000453:epidemiology*; D012923:Social Class; D013997:Time Factors