Ballard, Keith Emerson <br/><br/>
Study guide for copi : introduction to logic /  
Keith Emerson Ballard 
 - Cuarta edición 
 - New York :   Macmillan Publishers,  1972 
 - 274 p. : figs 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lógica
<br/><br/><label>Dewey Class. No.: </label>160 B189s 1972