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

 - 4th ed. 
 - Toronto  University of Toronto Press  1970 
 - xxix, 418 p. 
<br/><br/><label>ISBN: </label>802017436 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mechanics
<br/><br/><label>Dewey Class. No.: </label>531  / LAN