Cruz, Corazon L. <br/><br/>
Introduction to logic / 
Corazon L. Cruz. 
 - 4th ed. 
 - Manila :  National Book Store,  c1995. 
 - xii, 363 p. : ill. 
<br/><br/> Includes bibliography and index 
<br/><br/><label>ISBN: </label>9710857975 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic