Veblen, Oswald  1880-1960. <br/><br/>
Invariants of quadratic differential forms / 
by Oswald Veblen. 
 - 1st ed. 
 - Cambridge :  Cambridge University Press,  1927, [Reprint 1952] 
 - viii, 102 p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential forms.<br/>Differential invariants.
<br/><br/><label>Dewey Class. No.: </label>515.37  / VEI 1952