Introduction to logic 
Cruz, Corazon L. 
 - revised edition. 
 -  National Book Store, Inc. 
 - x, 344 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71080152-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.
<br/><br/><label>Dewey Class. No.: </label>F 160 C87 1983