Nayfeh, Ali Hasan <br/><br/>
Nonlinear oscillations 
by Ali Hasan Nayfeh and Dean T. Mook 
 - New York  John Wiley & sons  1979 
 - xiv, 704p.;  23cm.- 
 - Pure and applied mathematics .
<br/><br/><label>Dewey Class. No.: </label>531.322  / NAY