Medicinal plants : their role in health and biodiversity /
edited by Timothy R. Tomlinson and Olayiwola Akerele.
- Philadelphia : University of Pennsylvania Press, 1998.
- xii, 221 p. : ill. ; 24 cm.
"Proceedings of an international symposium cosponsored by the Morris Arboretum of the University of Pennsylvania and the World Health Organization, Philadelphia, Pennsylvania, April 1993"--P. facing t.p.