00458nam a2200133Ia 4500008004100000020001800041040001700059082002400076110003900100245007500139260002200214440003700236650005100273190328s9999||||xx |||||||||||||| ||und||  a92-4-120867-8  aNITILcNITIL  221sta615.58bW927U  aWorld Health Organisation (Geneva) 4aThe use of essential drugsbseventh report of the WHO expert committee  aGenevabWHOc1997  aWHO technical report series; 867  aEssential drugs; Drug utilization; Guide lines