Transactions of the national academy of science and technology :  volume 13. 

 - Taguig, Metro Manila :  The National Academy of Science and Technology,  c1991. 
 - 882 pages :  Illustrations ;  23 cm. 
<br/><br/> Includes bibliographical references. 
<br/><br/><label>ISSN: </label>01158848 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical sciences.<br/>Physical engineering sciences.