TY  - BOOK
AU  - Date,C.J.
TI  - The database relational model: a retrospective review and analysis : a historical account and assessment of E.F. Codd's contribution to the field of database technology 
SN  - 0201612941
PY  - 2001///
CY  - Reading, MA
PB  - Addison-Wesley
KW  - Relational databases
N1  - Includes bibliographical references and index
ER  -