Copi, Irving M.- <br/><br/>
Symbolic logic/ 
Irving M. Copi. 
 - 4th ed. 
 - New York  Macmillan  1973 
 - xiii, 350 p. 24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>72-084875 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic, Symbolic and mathematical