Elen, L. W. F. <br/><br/>
Differential equations 
L. W. F. Elen 
 - London  Macmillan  1965 
 - vii, 220p.  pt.1 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>515.35  / EL39