Pearl, Leon. <br/><br/>
Descartes / 
by Leon Pearl. 
 - Boston :  Twayne Publishers,  1977. 
 - 228 p :  port ;  21 cm. 
 - Twayne's world leaders series ;  TWLS 63 .
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0805777148 
<br/><br/><label>LCCN: </label>7654502  
<br/><br/><label>Subjects--Personal Names: </label><br/>Descartes, Rene, 1595-1650.