Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SUDO Toshio and OTA Setsuji,"An Iron-Rich Variety of Montmorillonite found in ""Oya-ishi""",The Journal of the Geological Society of Japan,0016-7630,The Geological Society of Japan,1952,58,685,487-490,https://cir.nii.ac.jp/crid/1390282681214459136,https://doi.org/10.5575/geosoc.58.487