Birkhoff, Garrett, <br/><br/>
Ordinary differential equations  
Garrett Birkhoff, Gian-Carlo Rota. 
 - 4th ed. 
 - New York :  Wiley,  c1989. 
 - xi, 399 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0471860034 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.
<br/><br/><label>Dewey Class. No.: </label>515.3/52