. . . "Emergency warning systems : ways to notify the public in the new era of homeland security : hearing before the Subcommittee on Emergency Preparedness and Response of the Select Committee on Homeland Security, House of Representatives, One Hundred Eighth Congress, second session, September 22, 2004" . . . . . . . . . . . . . . . . "Emergency warning systems ways to notify the public in the new era of homeland security : hearing before the Subcommittee on Emergency Preparedness and Response of the Select Committee on Homeland Security, House of Representatives, One Hundred Eighth Congress, second session, September 22, 2004"@en . . . . .