011180000a22003490004500 PH-MaWHO 20241108112245.0 9241700505 Series Files Smart, R.G. 653091 Geneva : World Health Organization, 1980. Hughes P. H. 653092 Johnston, L. D. 653093 Anumonye, A. 653094 Khant, U. 646595 Mora, Maria Elena Medina 653095 Navaratnam, V. 646597 Poshyachinda, Vichai 653096 Varma, V. K. 646979 Wadud, K. A. 646601 World Health Organization. 641634 A methodology for student drug-use surveys. 55 p. http://www.who.int/iris/handle/10665/37206 WHO offset publication ; no. 50 eng Substance abuse In adolescence 653097 Substance-related disorders In adolescence 646980 Data collection methods 653098 WHOLIS MONO Mark 17-07-2013 15:40:34 5954 5954 0 0 0 0 WPRO WPRO 2021-05-23 0 Series Files 05954 2024-01-24 00:00:00 2021-05-23 MONO