00541nam a2200193Ia 450000500170000000800410001702000180005803500090007604100080008508200130009310000300010624500390013625000080017526000450018330000130022850000090024150500570025065000400030720260808125519.0260808s9999||||xx |||||||||||||| ||und|| a92-4-154493-7 a6823 aENG a616.3108 aWorld Health Organization 0aOral health surveysbBasic methods a4th aGenevabWorld Health Oraganizationc1997 avii + 66 aGift aWHO, international health, pathology, global disease aWHObPathology -- Internal medicine