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Keen, E.M.: ¬The Aberystwyth index languages tests (1973)
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- Source
- Journal of documentation. 29(1973), S.1-35
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Keen, E.M.: Prospects for classification suggested by evaluation tests (1976)
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- Pages
- S.142-157
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Keen, E.M.: On the generation and searching of entries in printed subject indexes (1977)
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- Source
- Journal of documentation. 33(1977) no.1, S.15-45