Wallis, T.E. (Thomas Edward) Textbook of pharmacognosy by T.E. Wallis. - 5th.ed. - Delhi CBS Publisher 1997 - 652p.: 256: ill.; 21 cm. Subjects--Topical Terms: Pharmacognosy Pharmacy Materia Medica, Vegetable. Dewey Class. No.: 615.321 / W16T