Boyd, Mark, F. <br/><br/>
Preventive medicine/ 
Mark F. Boyd 
 - 7th ed. 
 - Philadelphia:  W.B. Saunders,  1945 
 - 591 p.;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> $ 7.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medicine, Preventive<br/>Preventive health Services<br/>Public health<br/>National health Services
<br/><br/><label>Dewey Class. No.: </label>614