Pearl, Leon,  1922-1952. <br/><br/>
Descartes / 
by Leon Pearl. 
 - Boston :  Twayne Publishers,  c1977. 
 - 228 p. :  port. ;  21 cm. 
 - Twayne's world leaders series ;  TWLS 63 .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 223-224. 
<br/><br/><label>ISBN: </label>0805777148 
<br/><br/><label>LCCN: </label>76054502 
<br/><br/><label>Subjects--Personal Names: </label><br/>Descartes, Ren�e, 1596-1650. 
<br/><br/><label>LC Class. No.: </label>B 1875  / .P33