ISO 3028:1974 Photography — Expendable photoflash lamps — Determination of relative spectral energy distribution for calculation of spectral distribution index
1984ISO 3028:1984 Photography; Camera flash illuminants; Determination of ISO spectral distribution index (ISO/SDI)
1974ISO 3028:1974 Photography — Expendable photoflash lamps — Determination of relative spectral energy distribution for calculation of spectral distribution index