Samuelsson, Gunnar Drug of natural origin : a textbook of pharmacognosy / Gunnar Samuelsson - 4th ed. - Sweden : Apotekarsocieteten, 1999 - 551 p. : ill. ; 25 cm. Includes index ISBN: 9186274813 RM267.33 Subjects--Topical Terms: Pharmacognosy National Library of Medicine Call No.: QV752