Irving M.Copi,Carl Cohen. <br/><br/>
Introduction to logic / 
Copi M. Irving. 
 - 9th 
 - Canada :  Maxmillan ,  1994. 
 - 729p. : 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>97800232504151 
<br/><br/><label>Subjects--Personal Names: </label><br/>Irving M.Copi,<br/>Carl Cohen
<br/><br/><label>LC Class. No.: </label>BC108  / .C67 1994