@misc{oai:tsukuba.repo.nii.ac.jp:00010865,
 author = {Tazawa, Koichi and 田澤, 孝一},
 month = {},
 note = {1994, 【要旨】},
 title = {Isotope geochemistry of the Tertiary System in the Joban coal field, Northeast Japan},
 year = {1995}
}