007430000a22001810004500003000900000005001700009562003000026111010500056710005500161710003600216245018200252264004900434300000900483041000800492650002400500650002600524040001100550PH-MaWHO20241108112621.0 aWHO/ADH/92.3.-Unpublished aJoint World Health Organization/International Youth Foundation Meeting (1991 : Geneva, Switzerland). aWorld Health Organization. Adolescent Health Unit. aInternational Youth Foundation. aApproaches to adolescent health and development : principles for success : a Joint World Health Organization/International Youth Foundation Meeting, Geneva, 20-22 November 1991. aGeneva : bWorld Health Organization,c1992. a30p. aeng aAdolescent medicine aAdolescent psychology aWHOLIS