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Werf-Davelaar, T.v.d.: ¬De bibliografische beschrijving van elektronische informatiebronnen : de ontwikkeling van ISBD(ER) (1997)
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Verwer, R.: Waar is W.F. Hermans? : het bedrog van de OPC (1996)
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Vos, N.C.C.: ¬De toekomst van het titelbeschrijven (1997)
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Werf-Davelaar, T.v.d.: ¬De bibliografische beschrijving van elektronische informatiebronnen : 2 (1997)
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