Web Link Hits      Deutsches Institut fur Normung 1989      Association Francaise de Normalisation 1944      Standards Australia 2398      British Standards Institution 1971      American Society for Testing and Materials 1990      Etex group (Belgium) 2521      Promat group (Belgium) 3035      Knauf group (Germany) 1990      Boral group (Australia) 1994      United States Gypsum group (USA) 2050      Rondo (Australia) 2185      BPB group (United Kingdom) 2348      Saint-Gobain group (France) 1997      Selleys (Australia) 2851      CSR group (Australia) 2747      James Hardie group (Australia) 2188

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