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) Sumio Sakuma and Tatsuya Kajiwara and Setsuya Nakada and Kozo Uto and Hiroshi Shimizu,"Drilling and logging results of USDP-4 — Penetration into the volcanic conduit of Unzen Volcano, Japan",Journal of Volcanology and Geothermal Research,0377-0273,Elsevier BV,2008-07,175,1-2,1-12,https://cir.nii.ac.jp/crid/1361137046091738240,https://doi.org/10.1016/j.jvolgeores.2008.03.039