De Vera, Dennis A. <br/><br/>
A Brief guide to symbolic logic / 
Dennis A. De Vera. 
 - Metro Manila :  Grandwater Pub,  2010. 
 - vii, 192 p.:   ill.  22 cm. 
<br/><br/> Includes bibliography 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>978-971-94677-7-9 
<br/><br/><label>LC Class. No.: </label>511.3 D49b