007860000a22001810004500003000900000005001700009110006800026245028300094562003200377264004900409490003600458300001000494041000800504650003000512650002900542650002000571650001300591PH-MaWHO20241108112256.0  aWorld Health Organization. Action Programme on essential Drugs.  aUse of the WHO certification scheme on the quality of pharmaceutical products moving in international commerce : study carried out from April 1993 to February 1994 in 15 importing countries, two exporting countries and two international low-cost essential drugs supply agencies.  aWHO/DAP/94.21.--Unpublished  aGeneva : bWorld Health Organization,c1994.  a(DAP research series ; no. 16).  a146p.  aeng  aDrug and narcotic control  aDrug industry- standards  aQuality control  aCommerce