Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ohkubo Kazuaki,spectroradiometry and spectrocolorimetry,JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN,00192341,The Illuminating Engineering Institute of Japan,1997,81,3,235-240,https://cir.nii.ac.jp/crid/1390001204085070592,https://doi.org/10.2150/jieij1980.81.3_235