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Hersh, W.R.; Hickam, D.H.: ¬A comparison of two methods for indexing and retrieval from a full-text medical database (1992)
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Hersh, W.R.; Hickam, D.H.: ¬An evaluation of interactive Boolean and natural language searching with an online medical textbook (1995)
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Hersh, W.R.; Pentecost, J.; Hickam, D.H.: ¬A task-oriented approach to retrieval system evaluation (1995)
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