@article{Walker1990,
author="Godfrey J.A. Walker and Hans V. Hogerzeil and Ali O. Sallami",
title="Evaluation of rational drug prescribing in Democratic Yemen",
year="1990",
journal="Social Science and Medicine",
volume="31",
number="7",
pages="823-28",
keyword0="Medicine",
keyword1="Planning",
type="journal"
}