Trease and Evans' pharmacognosy / William Charles Evans. Pharmacognosy Evans, William Charles. Trease, George Edward, Evans, Daphne. Pharmacognosy. Pharmacognosy. RS160 .T75 2002 615.321 15 EVT Includes bibliographical references and index. New Delhi : WB Saunders, c2002. c2002. 2002 Text viii, 585 p. : eng