Derrick William R <br/><br/>
Elementary differential equations with applications. 
Derrick William R; Grossman Stanley I 
 -  1976 
<br/><br/><label>Standard No.: </label>77774 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B33, L6