Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Takeda Kunihiko and Obanawa Heiichiro,Sea Water as Metal Resources,Bulletin of the Japan Institute of Metals,0021-4426,The Japan Institute of Metals,1984,23,5,362-368,https://cir.nii.ac.jp/crid/1390282679031876096,https://doi.org/10.2320/materia1962.23.362