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  1. Mahnkopf, P.: Kein Mangel an Informationen : Bildschirmtext (1993) 10.31
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  2. Mahnkopf, P.: Fachinformation und ihre Vermarktung in den neuen Medien (1985) 10.31
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  3. Mahnkopf, P.: Endkundensysteme in T-Online, Datex-J, Btx (1997) 10.31
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