Purtill, Richard L. <br/><br/>
A logical introduction to philosophy / 
Richard L. Purtill. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1989. 
 - xiv, 264 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0135399173 
<br/><br/><label>LCCN: </label>88-15541 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philosophy--Introductions.<br/>Logic.