Langer, Rudolph E.  <br/><br/>
A first course in ordinary differential equations / 
Rudolph E. Langer. 
 - London :   John Wiley,   c 1956. 
 - xii, 249 p. :  ill. ;  22 cm. 
<br/><br/> Include index. 
<br/><br/>339  339 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Analysis.<br/>Logarithmic integrals.
<br/><br/><label>Dewey Class. No.: </label>517.38 / L263f