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1nork Jensen, Peter R.Gaiak “...Telecommunication History 20th century....”
Argitaratua 2000
Liburua -
2nork Naughton, John (John J.)Gaiak “...Telecommunication History 20th century....”
Argitaratua 2000
Liburua -
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4Argitaratua 1997GaiakLiburua
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5nork Kargon, Robert H. (Robert Hugh)Gaiak Connect to electronic resource
Argitaratua 2008
Baliabide elektronikoa eBook -
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