Ymas, Sergio E., Jr. <br/><br/>
Integral calculus/ 
Sergio E. Ymas Jr., Christian I. Niegas 
 - Edition 2023  limited edition only 
 - Valenzuela City;  Ymas Publishing House,  c2023. 
 -  308 pages 
<br/><br/><label>ISBN: </label>9789710438037 
<br/><br/><label>Dewey Class. No.: </label>515.4