title: [The hippies: historical parallels].
mesh_terms: D002562:Ceremonial Behavior / Q000266:history; D003469:Culture / Q000266:history; D004739:England; D006115:Greece; D006213:Hallucinogens / Q000266:history; D049673:History, 20th Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D012924:Social Conditions; D012925:Social Conformity; D019966:Substance-Related Disorders; D014481:United States
chemical_list: D006213:Hallucinogens
vernacular_title: De hippies: historische parallellen.