Boyd, Mark F. <br/><br/>
Preventive medicine 

 - 7th 
 - Philadelphia  W. B. Saunders    1945 
 - 591 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>  Medicine<br/>  Preventive medicine<br/>  Public health<br/>Hygiene
<br/><br/><label>Dewey Class. No.: </label>614  / B692p 1945