Piñon, Manuel. <br/><br/>Logic primer / Manuel Piñon.  - Manila :  Rex Printing Company,  ©1979.  - 232 pages ;  22 cm. <br/><br/><label>ISBN: </label>9712314243 <br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.<br/><br/><label>LC Class. No.: </label>BC108  / .P656 1979