Lefschetz, Solomon <br/><br/>
Contributions to the Theory of Nonlinear oscillations (AM-20), Volume I 

 -  Walter de Gruyter  Walter de Gruyter  1950 
<br/><br/><label>ISBN: </label>9781400882632 
<br/><br/><label>Source: </label>EBOOK 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics