@misc{oai:tsukuba.repo.nii.ac.jp:00010549,
 author = {Koga, Shuichiro and 古賀, 修一郎},
 month = {},
 note = {1982, 【要旨】},
 title = {Geology and petrology of Akagi volcano, Gunma prefecture, Japan},
 year = {1983}
}