Boas, Ernst P. 1891-1955. Treatment of the patient past fifty. - Third ed. - Chicago, The Year Book Pub. [1947] - 479 p. illus (part col.) 21 cm. - The General practice manuals . On spine: The patient past fifty. Bibliographical foot-notes. LCCN: med47002184 Subjects--Topical Terms: Middle age.Medicine--Practice. LC Class. No.: RC967 / .B6 1947 Dewey Class. No.: 618.97