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Werf-Davelaar, T.v.d.: ¬De bibliografische beschrijving van elektronische informatiebronnen : 2 (1997)
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- Informatie professional. 1(1997) nos.7/8, S.25-31
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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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- Informatie professional. 1(1997) no.6, S.26-31