Young people in Wales : findings from the Health Behaviour in School-aged Children (HBSC) study, 1986-2000 = Pobl ifanc yng Nghymru : canfyddiadau o'r astudiaeth o Ymddygiad lechyd mewn Plant Oedran Y. Published by Research and Evaluation Branch, Health Promotion Division, Welsh Assembly Government in 2002. Publication and catalogue information, links to buy online and reader comments.