TY  - BOOK
AU  - Codd, E.F.
TI  - Relational model for database management: version 2
SN  - 0201141922
U1  - 005.756 
PY  - 1990///
CY  - Reading, Massachusetts
PB  - Addison-Wesley
KW  - Data Base Management
KW  - Relational Data Bases
N1  - Includes Index
ER  -