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Bosman, F.E.; Ongering, M.A.H.; Smit, H.P.A.: Observeren en registeren : evaluatieonderzoek naar OPC3 (1993)
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Plaister, J.: PICA : Centrum voor Bibliotheekautomatisering (1987)
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Werf-Davelaar, T.v.d.: ¬De bibliografische beschrijving van elektronische informatiebronnen : 2 (1997)
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