Cruz, Corazon L. <br/><br/>
Introduction to logic/ 
Corazon L. Cruz. 
 - Fourth edition. 
 - Mandaluyong:  National Book Store,  c1995. 
 - xii, 363 pages:  illustrations;  22 cm. 
<br/><br/>Bibliography: page 359.  
<br/><br/><label>ISBN: </label>9710857975 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.<br/>Logic--Problems, exercises, etc.<br/>Logic--Study and teaching.
<br/><br/><label>Dewey Class. No.: </label>160