@article{169132,
      url = {http://digitallibrary.un.org/record/169132},
      title = {Psychotropic substances : statistics for 1991 :  assessments of medical and scientific requirements for  substances in schedules 2, 3 and 4, requirement of import  authorizations for substances in schedules 3 and 4 =  Substances psychotropes : statistiques pour 1991 :  prévisions des besoins annuels médicaux et scientifiques  concernant les substances des tableaux 2, 3 et 4,  autorisations d'importation exigées pour les substances  des tableaux 3 et 4.},
      publisher = {UN,},
      recid = {169132},
      pages = {v, 224 p. :},
      address = {New York :. 1992},
      year = {1992},
}