TY  - GEN
AU  - Date, C.J.
TI  - An introduction to database systems vol.I
SN  - 8185015589
U1  - 005.4 
PY  - 1981///
CY  - New Delhi
PB  - Narosa Publishing House
KW  - Systems programming
KW  - Computer programming
KW  - Programms data
ER  -