著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) KOROLEFF F,Direct determination of ammonia in natural waters as indophenol blue,Information on Techniques and Methods for Seawater Analysis,,International Council of Exploration of the Sea,1970,,,19-22,https://cir.nii.ac.jp/crid/1570572700963720192,