Bettinghaus, erwin P,  1930- <br/><br/>
Message preparation :  the nature of proof / 
Erwin P. ettinghau. 
 - Indianapolic :  Bobbs-Merrill,  1966. 
 - viii, 127 p. :  illus. ;  21 cm. 
 - The Bobbs-Merrill series in speech communication ,1 .
<br/><br/>Includes bibliography. 
<br/><br/> Open. 
<br/><br/><label>LCCN: </label>6617583  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Public speaking.<br/>Belief and doubt.