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Grolier Interactive and IBM's World Book roll out 1998 multimedia encyclopaedias (1997)
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Jascó, P.: ¬The 1998 editions of general interest encyclopedias (1998)
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Pack, T.: Grolier Multimedia Encyclopedia : now in two versions (1998)
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Pack, T.: Digital circles of knowledge (1995)
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Gilmore, F.L.: Compton's Multimedia Encyclopedia (1992)
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