1997EN 20354:1997 Acoustics - Measurement of Sound Absorption in a Reverberation Room Includes Amendment A1: 1997; ISO 354: 1985 + A1: 1997
1994EN 20354:1994 Acoustics - Measurement of Sound Absorption in a Reverberation Room Amendment 1: Annex D - Test Specimen Mountings for Sound Absorption Tests.
1993EN 20354:1993 Acoustics - Measurement of Sound Absorption in a Reverberation Room (ISO 354 : 1985)