Efimov, N. V. <br/><br/>
Quadratic forms and matrices,  an introductory approach 
[by] N.V. Yefimov. Translated and edited, by A. Shenitzer. 
 - New York,  Academic Press  [1964] 
 - ix, 164 p.  illus.  21 cm. 
<br/><br/><label>Subjects--Index Terms: </label>Forms, Quadratic.2.Matrices 
<br/><br/><label>Dewey Class. No.: </label>512.87  / EFI