1
Autores Flórez Alarcón, Luis
Publicado 2002-01-01
Descripción:
“...;at the beginning. The design was experimental. The  experimental  group had 120 participants...”Publicado 2002-01-01
3
Autores Jaimes Osma, Jesús Enrique
Publicado 2000-07-01
Descripción:
“... abuse and the Internet use. At the beginning a questionnaire of prevalence of psychoactive drug abuse...”Publicado 2000-07-01
20