title: An ecosystems approach to the study of dangerous drug use and abuse with special reference to the marijuana issue.
mesh_terms: D000223:Adaptation, Psychological; D000328:Adult; D001290:Attitude; D002140:California; D002188:Cannabis; D003213:Conditioning, Psychological; D004463:Ecology; D006801:Humans; D007398:Interpersonal Relations; D008962:Models, Theoretical; D010549:Personal Satisfaction; D011569:Psychiatric Status Rating Scales; D012107:Research Design; D012919:Social Behavior; D012922:Social Change; D012926:Social Control, Formal; D012931:Social Environment; D012945:Social Values; D012959:Socioeconomic Factors; D019966:Substance-Related Disorders