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Donkersloot, H.B.: Zoeken op titelwoorden : een oderzoek met de on-line publiekscatalogus (1985)
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- Open. 17(1985), no.12, S.542-546
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Ongering, H.; Riesthuis, G.J.A.: ¬De ontsluiting in het ADION-systeem : precision en recall (1989)
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- Open. 21(1989) nos.7/8, S.261-264