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- EUROPEAN STANDARDS STRUGGLE, ISDN NEWS, 28.07.1993, 3.
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- Agenda. 8th EIUF Plenary Meeting. Copenhagen
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- European ISDN User Forum:
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- Norman Johnson: Final Report. European ISDN User Forum. 8th Plenary Meeting.
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- "ISDN - Die Eröffnung neuer Möglichkeiten".
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- Základni informace o ISDN
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- BSB kontrolliert Pay-TV mit Eurocypher
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- Stills from the promotion video
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- Plan Direktor, SEVILLE 1992
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- Glossary of EIUF abbreviations