000 00198 a2200085 4500
020 _a9780791098394
082 _a362.1 PREN
100 _aPrentzas G S
_9127209
245 _aThe world health organizations
999 _c754771
_d754770
942 _w429
_xElizabeth Motloung
_y429
_zElizabeth Motloung