NELSON, ALFRED L. <br/><br/>
DIFFERENTIAL EQUATIONS 

 - 2ND ED. 
 - BOSTON Estados Unidos  D.C. HEATH AND COMPANY  1960 
 - 308 
<br/><br/><label>LCCN: </label>9656 
<br/><br/><label>Dewey Class. No.: </label>515.35