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) Ballala Dadda ould and Murae Tatsushi,Spectroscopic Characterization of Humic Acids Isolated from the Sediments in Hakata Bay,Researches in Organic Geochemistry,13449915,日本有機地球化学会,2001,16,0,39-47,https://cir.nii.ac.jp/crid/1390282680389871232,https://doi.org/10.20612/rog.16.0_39