Allen, H.C. Keynotes and characteristics with comparisons of some of the leading remedies of the materia medica/ H.C. Allen - 5th ed. - Philadelphia: Boericke and Tafel, 1925 - 318 p.; 23 cm. Includes index Subjects--Topical Terms: Maateria medicaPharmacopoeiasPharmacy Dewey Class. No.: 615.532