Drugs of abuse (1) School enrollment (1) Young consumers (1) Youth (1) School children (1) Research (1) Psychology (1) Population (1) Marijuana (1) Health (1) Drug abuse (1) Drinking of alcoholic beverages (1) Design (1) Crosses (1) Consumption (Economics) (1) Collective settlements (1) Bebidas alcohólicas--Consumo (1) Drogas--Consumo (1) Estudiantes matriculados (1) Consumo juvenil (1) Estudios (1) Comunidades (1) Factores (1) Salud (1) Marihuana (1) Estudio (1) Escolares (1) Diseño (1) Cruces (1) Información (1)