title: Trends in reported illegal narcotic use in Canada: 1956-1975.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002170:Canada; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D019966:Substance-Related Disorders / Q000453:epidemiology*; D013997:Time Factors