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author_ss:"Needham, R.M."
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Joyce, T.; Needham, R.M.: ¬The thesaurus approach to information retrieval (1958)
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- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgang Kaufmann 1997. S.15-20.
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Needham, R.M.; Sparck Jones, K.: Keywords and clumps (1985)
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