UNE-EN ISO 13468-1:2020 Plastics - Determination of the total luminous transmittance of transparent materials - Part 1: Single-beam instrument (ISO 13468-1:2019)
2020UNE-EN ISO 13468-1:2020 Plastics - Determination of the total luminous transmittance of transparent materials - Part 1: Single-beam instrument (ISO 13468-1:2019)
1997UNE-EN ISO 13468-1:1997 PLASTICS. DETERMINATION OF THE TOTAL LUMINOUS TRANSMITANCE OF TRANSPARENT MATERIALS. PART 1: SINGLE-BEAM INSTRUMENT. (ISO 13468-1:1996).