2021DIN EN ISO 13468-2:2021 Plastics - Determination of the total luminous transmittance of transparent materials - Part 2: Double-beam instrument (ISO 13468-2:2021); German version EN ISO 13468-2:2021
2006DIN EN ISO 13468-2:2006 Plastics - Determination of the total luminous transmittance of transparent materials - Part 2: Double-beam instrument (ISO 13468-2:1999) English version of DIN EN ISO 13468-2:2006-07