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Lancaster, F.W.: MEDLARS : report on the evaluation of its operating effiency (1961)
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- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.223-246.
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Lancaster, F.W.: On the need for role indicators in postcoordinate retrieval systems (1968)
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