Purtill Richard L <br/><br/>
Logic    argument refutation and Prof 

 - N.Y  Harper & Row       1979 
<br/><br/><label>Standard No.: </label>10,292 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LOGIC
<br/><br/><label>Dewey Class. No.: </label>R1, L91