Duff G F D <br/><br/>
Differential equations of applied mathematics. 
Duff G F D; Naylor D 
 -  1966 
<br/><br/><label>Standard No.: </label>87875 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B33, K6