@article{oai:niigata-u.repo.nii.ac.jp:00003236,
 author = {栗田, 裕司 and 三輪, 美智子},
 issue = {1},
 journal = {地質学雑誌, 地質学雑誌},
 month = {Jan},
 pages = {56--59},
 title = {北海道夕張炭田地域、漸新統紅葉山層の渦鞭毛藻化石層序と年代},
 volume = {104},
 year = {1998}
}