2008DIN 54500:2008-09 Testing of paper - Determination of the density-related light-scattering and absorption coefficients of paper and fibre materials
2008DIN 54500:2008 Testing of paper - Determination of the density-related light-scattering and absorption coefficients of paper and fibre materials
2004DIN 54500:2004 Testing of paper - Determination of the density-related light-scattering and absorption coefficients of paper and fibre materials