Petry, W.; Werner, H.-J.: Anwendertraum: Kommunikations- und Retrieval-Software im Vergleich (1993)
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- Source
- Cogito. 9(1993) H.2, S.18-22
Petry, W.: Datenreisen billiger : wie man Telekommunikationskosten sparen kann (1994)
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- Abstract
- Beschreibung der neuen Gebührenstrukturen im Datex-Bereich seit 1.8.94
- Source
- Cogito. 10(1994) H.4, S.17-22