"Réflectance Normes." . . . . . . . . . . . . . . . . "White Opal Glass Diffuse Spectral Reflectance Standards for the Visible Spectrum (SRM-S 2015 and 2016)" . . . "White opal glass diffuse spectral reflectance standards for the visible spectrum (SRM's 2015 and 2016)"@en . "White opal glass diffuse spectral reflectance standards for the visible spectrum (SRM's 2015 and 2016)" . . . . . "Opaline Normes." . .