Lyall, F. (2011). International communications: The International Telecommunication Union and the Universal Postal Union. Farnham: Ashgate.
Styl ChicagoLyall, Francis. International Communications: The International Telecommunication Union and the Universal Postal Union. Farnham: Ashgate, 2011.
Citace podle MLALyall, Francis. International Communications: The International Telecommunication Union and the Universal Postal Union. Farnham: Ashgate, 2011.
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