Kozy John <br/><br/>
Understanding natural deduction    a formalist approach to introductory logic 

 - Encino  Dickenson Publishing        1974 
 - ix,236p  cm. 
<br/><br/><label>Standard No.: </label>64,578 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHILOSOPHY
<br/><br/><label>Dewey Class. No.: </label>R12, L4