TELECOMMUNICATIONS/ORGANIZATION AND SERVICES
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BTPUBLIC ENTREPRISES
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UDC654
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Descriptor GERNACHRICHTENWESEN/ORGANISATION UND BETRIEB
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Descriptor ENGTELECOMMUNICATIONS/ORGANIZATION AND SERVICES
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Descriptor FRETÉLÉCOMMUNICATIONS/ORGANISATION ET SERVICES
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NTBROADCASTING, TELEGRAPHY, TELEPHONY, TELEVISION (ORGANISATION, OPERATION)
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NTHISTORY OF TELECOMMUNICATIONS (ORGANISATION, OPERATION)
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RTINFORMATION + COMMUNICATION