TY  - BOOK
AU  - Date,C.J.
TI  - An introduction to database systems
SN  - 0201144719
AV  - QA76.9.D3 D37 1981
U1  - 001.64 
PY  - 1981///-c1983
CY  - Reading, Mass.
PB  - Addison-Wesley Pub. Co.
KW  - Database management
N1  - Includes bibliographies and index
ER  -