Calalang Jr.,Bayani Antonio U. <br/><br/>To be logical Bayani Antonio U. Calalang Jr.  - Mandaluyong City  Books Atbpages Pub. Corpages  2011  - xi, 147 pages:  colour illustration;  22 cm <br/><br/> Includes references <br/><br/><label>ISBN: </label>9710412150 <br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.<br/><br/><label>LC Class. No.: </label>BC71  / 160 C12t 2011