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- author's%3a%22Liu%2c S.%22 2
- authors%3a%22Liu%2c S.%22 2
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Voorbij, H.: Wetenschappelijke informatie zoeken op Internet : landelijk gebruikersoderzoek (1998)
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- Informatie professional. 2(1998) no.5, S.19-23
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Hofstede, M.: Zoeken in PiCarta : de proef op de som (1998)
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- Informatie professional. 2(1998) no.11, S.16-21