Okpako, D. T. Principles of pharmacology : a tropical approach / D.T. Okpako. - 2nd ed. - Cambridge : Cambridge University Press, 1991. - xvi, 574 p. : ill. ; 24 cm. Includes index. Includes bibliographies. ISBN: 0521349036 (pbk.) Subjects--Topical Terms: Pharmacology.Drug Therapy.Tropical Medicine.