Lanczos, Cornelius <br/><br/>
Variational principles of mechanics 

 - 4 
 - New York  Dover Publications  1970 
 - xxix, 418p: ill.  
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0-486-65067-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Analytical mechanics<br/>Mechanical engineering