Codd E F.. <br/><br/>
The relational model for database management,  version 2   : version 2 

 - Reprinted with corrections 
 - Reading, Massachusetts   : Addison-Wesley   , 1991 
 - 214  p. :   215 p. :   xxii 538 p. :   il. ;   il. ;   il. ;  
<br/><br/><label>ISBN: </label>0201141922 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BASE DE DATOS<br/>GESTION DE BASES DE DATOS<br/>MODELO RELACIONAL
<br/><br/><label>Universal Decimal Class. No.: </label>004.65 C669r