@article{1981xbugau9,
  title = {和人地・蝦夷地の境界とその変遷},
  author = {エドモンズ リチャード},
  year = {1981},
  doi = {10.4200/jjhg1948.33.193},
  language = {ain},
  url = {https://doi.org/10.4200/jjhg1948.33.193}
}