Complete multilingual dictionary of aviation and aeronautical terminology : english: french: spanish / comp. Henri Demaison
ITU-R IS series : compatibility between the sound-broadcasting service in the band of about 87-108 MHz and the aeronautical services in the band 108-137 MHz: 1994: rec. ITU-R IS.1009: (new as of 9 November 1993) / ITU-R