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024 _a68234
037 _cTextual
040 _aCSL
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041 _aeng
082 _aD65,8(2:55), M0.3
100 _aOpen University
245 0 _cby Open University
_aComputer based information systems : Block 3
260 _c1980
300 _ap.
_ccm.
650 _aComputer science
942 _hD65,8(2:55), M0.3
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