Longer Rudolph E <br/><br/>
First course in ordinary differential equations 

 -  1954 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>22487 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B331, J4