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Armstrong, C.J.; Keen, E.M.: Workbook for NEPHIS and KWAC : Microcomputer printed subject indexes teaching package, Pt.1 (1982)
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- British Library research and development report; 5710
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Armstrong, C.J.; Keen, E.M.: Manual for teaching NEPHIS and KWAC : Microcomputer printed subject indexes teaching package, Pt.2 (1982)
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- British Library research and development report: 5711