@book{nagatahokkaidoezogochimeikaidaiyonbanbunrui,
  title = {第四版『北海道蝦夷語地名解』分類(五十音別譯附)},
  author = {永田方正著 ; 杵渕祐二編},
  language = {ain},
  url = {https://ci.nii.ac.jp/ncid/BN03387707}
}