Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TAKESHITA Yoshihiro and TANABE Tomotaka,"Tephra beds from the Older Ontake Volcano found from the Middle Pleistocene, Tsumagoi Group on the southeastern foot of the Azumaya Volcano, Central Japan",Earth Science (Chikyu Kagaku),03666611,The Association for the Geological Collaboration in Japan,2010,64,1,1-9,https://cir.nii.ac.jp/crid/1390282679210986240,https://doi.org/10.15080/agcjchikyukagaku.64.1_1