Marihuana use by college students: three-year trends, 1970-1972.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002188:Cannabis; D005260:Female; D006801:Humans; D008297:Male; D008393:Marriage; D009516:New Mexico; D012067:Religion; D012737:Sex Factors; D013334:Students; D019966:Substance-Related Disorders / Q000453:epidemiology*; D013997:Time Factors; D014495:Universities