Lovelock, David. <br/><br/>
Tensors differential forms and variational principles   
by David Lovelock, Hanno Rund 
 - New York  Wiley Interscience Publication  1975 
 - xi, 364p. 
 - Pure and Applied Mathematics .
<br/><br/><label>ISBN: </label>0471584505 
<br/><br/><label>Dewey Class. No.: </label>515.63  / N751