Edwards, C. Henry (Charles Henry), Penney, David E. <br/><br/>
Elementary Differential Equations with Boundary Value Problems  

 - 6th Edition  
 -  Pearson   2019 
 - 760 p. 
<br/><br/><label>ISBN: </label>9789353432782 
<br/><br/><label>Dewey Class. No.: </label>515.35 EDW