Flesch, Rudolf Franz,  1911- <br/><br/>
The art of clear thinking / 
Rudolf F. Flesch. 
 - 1st ed. 
 - New York :  Harper,  1951 
 - 212 p. :  illus. ;  21 cm. 
<br/><br/> Open access. 
<br/><br/><label>LCCN: </label>5113979  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Thought and thinking.<br/>Logic.