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Doek, A.: Antwoord op elke vraag : Bilbiofoon aan een vergelijkend 'warenonderzoek' onderworpen (1994)
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Sieverts, E.: Ask Jeeves : Je kunt hem alles, maar of hij je altijd begrijpt ... (2000)
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7e Dag van het Document : 19 & 20 mei 1998, Congrescentrum De Reehorst, Ede ; proceedings (1998)
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