Flesch, Rudolf  <br/><br/>
How to test readability 

 - 1 ed. 
 - New York :   Harper  Brothers,   c1951 
 - 56 p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>redacción
<br/><br/><label>Dewey Class. No.: </label>808.0600 F63h