Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HORIKOSHI Ei,Finding of the Radiolarian Fossils in the 'Oxide Bed' of the Hanaoka Mine,Mining Geology,0026-5209,The Society of Resource Geology,1965,15,73,273-275,https://cir.nii.ac.jp/crid/1390282681502268288,https://doi.org/10.11456/shigenchishitsu1951.15.73_273