Ennis, Robert Hugh,  1927- <br/><br/>
Logic in teaching / 
by Robert H. Ennis 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1969 
 - xiv, 520 p. :  illus. ;  24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic in teaching