Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HAMAGUCHI Hiroshi and KURODA Rokuro and YOSHIDA Moriyuki and ONUMA Naoki,Differential spectrophotometric determination of nitric acid or nitrate,BUNSEKI KAGAKU,05251931,The Japan Society for Analytical Chemistry,1960,9,1,53-58,https://cir.nii.ac.jp/crid/1390282679637691904,https://doi.org/10.2116/bunsekikagaku.9.53