Nayfeh Ali Hasan <br/><br/>
Perturbation methods 
Nayfeh Ali Hasan 
 - New York       John Wiley         1973 
 - xii, 425p.  cm. 
<br/><br/> Bibliography 387-416p. 
<br/><br/><label>Standard No.: </label>25203 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrophysics
<br/><br/><label>Dewey Class. No.: </label>B9:75, L3-;1