Lefschetz, Solomon,   ( 1884-1972 ) <br/><br/>
Contributions to the theory of nonlinear oscillations /    v. 2. 
[by] M.L. Cartwright [and others]. 
 - Princeton :   Princeton University Press,   1952. 
 - 116 p. :   diagrs.  23 cm. 
 - Annals of mathematics studies, ;   29 .
 - Annals of mathematics studies. ;   no. 29 .
<br/><br/> Vol. 5 edited by L. Cesari, J. LaSalle, and S. Lefschetz. 
<br/><br/><label>LCCN: </label>50002400  
<br/><br/><label>Subjects--Topical Terms: </label><br/>OSCILACIONES
<br/><br/><label>Dewey Class. No.: </label>531.3