Hinch, E.J <br/><br/>
Perturbation methods 
E.J. Hinch 
 - Cambridge  Cambridge University Press  1991 
 - xi  160 
 - Cambridge texts in applied mathematics .
<br/><br/><label>ISBN: </label>9780521378970 
<br/><br/><label>Dewey Class. No.: </label>4.04  / HINC