http://whqlibdoc.who.int/hq/1991/WHO_DAP_91.1.pdf

A study of three shipments of essential drugs, sent from Nigeria, Uganda and Thailand. Temperature and humidity within the test kits were monitored every three hours. The potency and quality of the drugs were measured before and after shipment. This report includes a detailed description of the materials and methods used, the full results of the quality analysis of the drugs, a reference list and bibliography. Document in pdf format; Acrobat Reader required.