Spinoza, Benedictus de,  1632-1677. <br/><br/>
On the improvement of the understanding / 
Benedictus de Spinoza; translated with an introduction, by Joseph Katz. 
 - New York :  Liberal Arts Press,  1958. 
 - xx, 40 p. ;  21 cm. 
 - The Library of liberal arts ;  no.67 .
<br/><br/> Includes bibliographical references (p. xix) 
<br/><br/><label>Dewey Class. No.: </label>199.492