Ensuring compatibility with enhanced 911 emergency calling systems: A progress report 
Subtitle: hearing before the Subcommittee on Telecommunications and the Internet ... Congress, first session, June 14, 2001
Publisher: For sale by the Supt. of Docs., U.S. G.P.O. [Congressional Sales Office]
Published: 2001
Language: eng
Number of pages: 67
ISBN-13: 9780160660146