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Voice over Internet Protocol (VoIP) and the future of 9-1-1 services : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Tenth Congress, first session, April 10, 2007
- "Voice over Internet Protocol (VoIP) and the future of 9-1-1 services : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Tenth Congress, first session, April 10, 2007"@en