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Derr, R.L.: Questions: definitions, structure, and classification (1985)
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- Source
- RQ. 24(1985), S.186-190
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Derr, R.L.: Information seeking expressions of users (1984)
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- Source
- Journal of the American Society for Information Science. 35(1984) no.2, S.124-128
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Derr, R.L.: ¬A conceptual analysis of information need (1983)
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- Source
- Information processing and management. 19(1983), S.273-278