{backmatter}
<title>Pre-emphasis used on sound-programme circuits</title> ITU-T <title>NAB Audio Recording And Reproducing Standards For Disc Recording And Reproducing</title> National Association of Broadcaster{backmatter}
<title>Pre-emphasis used on sound-programme circuits</title> ITU-T <title>NAB Audio Recording And Reproducing Standards For Disc Recording And Reproducing</title> National Association of Broadcaster