2017-06-292026-03-272017-06-2919810376-8716https://doi.org/10.1016/0376-8716(81)90026-0https://repositorio.inprf.gob.mx/handle/123456789/4708engacceso cerradoAdolescentAdultAmphetamineCanadaChildHumansIndiaMarijuana AbuseMexicoStudentsSubstance-Related Disorders-epidemiologyTranquilizing AgentsDrug use among non-students in three countriesarticle1879-00462Instituto Mexicano de PsiquiatrÃa125-1327