Hurley, Patrick J. <br/><br/>
A concise introduction to logic / 
Patrick J. Hurley. 
 - 6th. 
 - Belmont :  Wadsworth,  1997. 
 - xvi , 655 p. :  ill. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>053450535x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.
<br/><br/><label>LC Class. No.: </label>BC108  / .H83