Logic : the essentials of deductive reasoning 
Agapay, Ramon B. 
 -  National Book Store.  1991 
 - 216 pages 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71084891-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Critical thinking.
<br/><br/><label>Dewey Class. No.: </label>GS 160 Ag1l 1991