Birkhoff, Garrett,   1911- <br/><br/>
Ordinary differential equations / 
Garrett Birkhoff, Gian-Carlo Rota. 
 - 4th ed. 
 - New York :  John Wiley & Sons,  1989 
 - 399 p. ;   22 cm. 
<br/><br/><label>ISBN: </label>0471500208 
<br/><br/><label>LCCN: </label>88-014231 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations