| 000 | 00354 a2200133 4500 | ||
|---|---|---|---|
| 020 | _a0335143369 | ||
| 082 |
_a005.74 _bOPE |
||
| 090 |
_c2701 _d3301 |
||
| 245 |
_aInformation systems _bUnit 2 direct files Unit 3 indexed files |
||
| 260 |
_aLondon _bOpen University _c1988 _g1988 |
||
| 300 |
_a27p. _c27cm |
||
| 650 | _aData files and databases | ||
| 942 | _cL | ||
| 999 |
_c31753 _d31753 |
||