Atienza, Obdulia L. and Consolacion P. Sauco other Ceferino C. Gabriel  <br/><br/>
Siningh ng komunikasyon  

 -  University of the East Textbooks Evaluation & Publication Office  1990 
 - 166 
<br/><br/><label>Dewey Class. No.: </label>499.2110141 Ar6