Calver, H N <br/><br/>
Use of Ratings in the Evaluation of Exhibits.  [electronic resource] 

 -  American journal of public health and the nation's health  Jun 1943 
 - 709-14 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0002-9572 
<br/><br/><label>Standard No.: </label>10.2105/ajph.33.6.709  doi