Oldenburger, Rufus <br/><br/>
characteristic of a quadratic form for an arbitrary field /- by Rufus Oldenburger 

 - Chicago, Ill. : Illinois Institute of Technology 
 - [10] p. 
<br/><br/> "Reprinted from the Transactions of the American Mathematic-al Society. Vol.53, No.3, pp.454-462, may, 1943".