@article{oai:air.repo.nii.ac.jp:00004598, author = {OHGUCHI, Takeshi}, issue = {3}, journal = {Journal of the Mining College, Akita University. Ser. A, Mining geology}, month = {Dec}, pages = {189--258}, title = {Stratigraphical and petrographical study of the Late cretaceous to Early miocene volcanic rocks in northeast inner Japan}, volume = {6}, year = {1983} }