R : base version 3.0: reference manual 

 - 3a ed 
 - [S. l.] :  Microrim,  1990 
 - 366 p. 
<br/><br/><label>LCCN: </label>004968 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INFORMATICA<br/>BASES DE DATOS
<br/><br/><label>Dewey Class. No.: </label>F 001.6