Introduction to logic 
Cruz, Corazon L. 
 - 4th ed. 
 -  National Book Store, Inc.,  1995 
 - xii,363 pages. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.
<br/><br/><label>Dewey Class. No.: </label>F 160 C9573 2011