De Villa, Evelyn SJ., <br/><br/>
Development of validation of worktext book in industrial arts /   
Evelyn SJ. De Villa.  
 - xv, 163 leaves :   Colored illustration, tables, figures ;   28 cm.  
<br/><br/>Included bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Basic Electricity and Electronics.<br/>Supplementary Materials.<br/>Industrial Arts.<br/>Proficiency level.
<br/><br/><label>Dewey Class. No.: </label>370.92  / D494d