Birkhoff, G & Rota, G-C <br/><br/>
Ordinary differential equations 
G. Birkhoff & G-C. Rota 
 - 2 
 - New York  John Wiley & sons  1969 
 - xiv  366 
<br/><br/><label>ISBN: </label>0471000329 
<br/><br/><label>Dewey Class. No.: </label>10.01  / BIRK