Howell, Kenneth B. <br/><br/>
Textbook in Mathematics ordinary differential equations :   an introduction to the fundamentals / 
Kenneth B. Howell. 
 - 2nd ed.  
 - Boca Raton:  CRC Press,  2020. 
 - xiv, 892 p.  
<br/><br/>Includes index. 
<br/><br/>
<br/><br/><label>ISBN: </label>978113860583 
<br/><br/><label>Dewey Class. No.: </label>515.3   / H859 2020 c.1