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Müller, T.; Neth, H.: Nachschlag : Zwölf Multimedia-Enzyklopädien für Windows und Mac (1997)
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Grolier introduces Encyclopedia Americana Online (1997)
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Jascó, P.: Two new academic encyclopedias on CD-ROM (1997)
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Pack, T.: Grolier provides Net access to leading encyclopedias (1998)
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