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Pao, M.L.: Concepts of information retrieval (1989)
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Pao, M.L.: ¬An empirical examination of Lotka's law (1986)
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Pao, M.L.: Specifity of terms in questions (1983)
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Pao, M.L.: Retrieval differences between term and citation indexing (1989)
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Pao, M.L.; Worthen, D.B.: Retrieval effectiveness by semantic and citation searching (1989)
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