Cruz, Corazon L. <br/><br/>
Introduction to Logic / 
Corazon L. Cruz 
 - [Place of publication not identifed] :  [publisher not identified],  c1983 
<br/><br/> Logic, Introduction 
<br/><br/><label>ISBN: </label>971080152X 
<br/><br/><label>LC Class. No.: </label>BC 71 .C9 1983