TY  - BOOK
AU  - Date,C.J.
TI  - An introduction to database systems
T2  - The systems programming series
SN  - 0201144522
AV  - QA76.9.D3 D37
U1  - 001.6/4 
PY  - 1975///]
CY  - Reading, Mass.
PB  - Addison-Wesley Pub. Co.
KW  - Database management
N1  - Includes bibliographies and index
ER  -