@book{2022hidetoshishiraishi7languagecontactinthenorth,
  title = {7 Language contact in the north},
  author = {白石 英才 and 丹菊 逸治},
  year = {2022},
  doi = {10.1515/9781501502859-008},
  language = {ain},
  url = {https://doi.org/10.1515/9781501502859-008}
}