Purtill, Richard L.,  1931-2016. <br/><br/>
Logic :  argument, refutation, and proof / 
Richard L. Purtill. 
 - New York :  Harper & Row,  c1979. 
 - xix, 412 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 408. 
<br/><br/><label>ISBN: </label>0063869004 
<br/><br/><label>LCCN: </label>78026207 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reasoning.<br/>Refutation (Logic)<br/>Evidence.<br/>Logic--Problems, exercises, etc.
<br/><br/><label>LC Class. No.: </label>BC177  / .P87 
<br/><br/><label>Dewey Class. No.: </label>160