Copi, Irving M. <br/><br/>
Symbolic logic 
/Irving M.Copi 
 - 5th ed. 
 - New Delhi  Prentice hall  1979 
 - xiii, 398 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>29787408 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Symbolic logic
<br/><br/><label>Dewey Class. No.: </label>160  / COP