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Hartge, T.: Computer Based Trainig : Telefonieren lernen (1994)
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Hartge, T.: Weiterbildung : Multimedia mit gestärktem Selbstbewußtsein (1994)
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Hartge, T.: Vernetzte Lernwelten : Versuche und Erfolge des TeleLearnings (1996)
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Hartge, T.: Multimedia in der Praxis : Einsatzmöglichkeiten, Beispiele, Weiterbildung (1994)
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