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Wood, A.J.: OPACs in public libraries : a second look (1989)
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Studwell, W.E.: Subject access on-line in academic libraries of the future : will intermediaries be an essential component? (1993)
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Golub, K.: Subject access in Swedish discovery services (2018)
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Van der Vet, P.E.; Mars, N.J.I.: Condorcet Query Engine : a query engine for coordinated index terms (1999)
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