Sargent, C A <br/><br/>
Method of Measuring the Effectiveness of Preventive Treatment in Reducing Morbidity.  [electronic resource] 

 -  American journal of public health and the nation's health  Dec 1940 
 - 1431-5 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0002-9572 
<br/><br/><label>Standard No.: </label>10.2105/ajph.30.12.1431  doi