Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Masami Kishi and Norimoto Watanabe,A Consideration on the Affinity of Natural Humic Colored Substances with Linear Alkylbenzene Sulfonate(LAS),北海道工業大学研究紀要 = Memoirs of the Hokkaido Institute of Technology,03850862,札幌 : 北海道工業大学,1987-03,,15,p253-261,https://cir.nii.ac.jp/crid/1520853835101034112,