2016DIN 4109-31:2016-07 Sound insulation in buildings - Part 31: Data for verification of sound insulation (component catalogue) - Framework document
2016DIN 4109-31:2016 Sound insulation in buildings - Part 31: Data for verification of sound insulation (component catalogue) - Framework document
1970DIN 4109-31 E:2013-11 Sound insulation in buildings - Part 31: Data for verification of sound insulation (component catalogue) - Framework document