Olver, Peter J. <br/><br/>
Equivalence, invariants and symmetry  / 

 - Cambridge:  Cambridge University Press,  1995 
 - xvi, 525p. Index 
<br/><br/> "Purchased under NBHM grant for the year 1995-96" 
<br/><br/><label>Dewey Class. No.: </label>515.35  / Ol52.EI