O'Malley, Robert E <br/><br/>
Thinking about ordinary differential equations 

 - Cambridge  Cambridge university press  1997 
 - x,247p.  22cm. PB. 
 - Cambridge texts in applied mathematics .
<br/><br/><label>ISBN: </label>0521557429 
<br/><br/><label>Dewey Class. No.: </label>515.352  / OMA