00719cam a22002411 4500 sg 45000196 DLC 20260227112746.0 751114s1945 pauabk b 001 0 eng sg 45000196 (OCoLC)1833542 DLC F ODaU DLC RA425 .B73 1945 Boyd, Mark F. (Mark Frederick), 1889-1968. Preventive medicine, by Mark F. Boyd. 7th ed., rev. Philadelphia, London, W.B. Saunders, c1945. x, 591 p. illus. (part col.), maps, forms, 24 cm. Bibliography: p. 560-566. Includes index. Hygiene. Medicine, Preventive. 90616 90616