Lefschetz, Solomon <br/><br/>
Contributions To The Theory Of Nonlinear Oscillations. 

 - Princeton  Princeton Univ. Press.  1950 
 - ix,350P 
 - Annals Of Mathematics Studies-20 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>B7:5
<br/><br/><label>Dewey Class. No.: </label>B7:5  / I0