Рок-энциклопедия — X X (USA; Punk) Xandria (Germany; Gothic Metal) Xenon (USA; Melodic Rock) Xentrix (UK; Thrash) X-Legged Sally (Belgium; Avant Prog/Jazz Rock) X-Ray Spex (UK; Punk) X-Wild (Germany; Speed Metal) XYZ (USA; Glam Metal)