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Final Acts WATTC-88, Melbourne 1988
International Telecommunication Regulations - Melbourne - (WATTC-88) (Melbourne, 1988)
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Actas de la Asamblea Mundial de Normalización de las Telecomunicaciones (Johannesburg, 2008)
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World Telecommunication Standardization Assembly Proceedings (Johannesburg, 2008)
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Handbook telephonometry - ADDITIONS 1999
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