Yefimov, N.V. <br/><br/>
Qudratic forms and matrices  an introductory approach 
by N.V.Yefimov, tr. by A.Shenitzer 
 - New York  Academic Press  1964 
 - ix, 164p. 
<br/><br/><label>LCCN: </label>64-24669 
<br/><br/><label>Dewey Class. No.: </label>512.942  / N641