Hurley, Patrick J.,  1942- <br/><br/>
A concise introduction to logic / 
Patrick J. Hurley. 
 - 9th ed. 
 - Australia ;  Belmont, CA :  Thomson/Wadsworth,  2006. 
 - xv, 656 p. :  ill. ;  25 cm. +  1 CD-ROM (4 3/4 in.). 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.