Johnstone, Rutherford Thompson,    1894- <br/><br/>
Occupational medicine and industrial hygiene /    
Rutherford Thompso n Johnstone. 
 - St. Louis :   C. V. Mosby,   1948. 
 - 604 p. :    ill. (part col.) ;    25 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Occupational Medicine--------
<br/><br/><label>National Library of Medicine Call No.: </label>WA 400   /  J656o