N.N.Bogoliubov <br/><br/>
Asymptotic Methods in The Theory of Non-Linear Oscillations 
/ by N.N Bogoliubov 
 - Delhi  Hindustan Publishing Corpn  1961 
 - 534p. 
<br/><br/><label>Dewey Class. No.: </label>517.382  / BOG/A