@article{2006x1jlvgbt,
  title = {「チャシ即ち蝦夷の砦」と「北千島調査報文」(コラム 歴史の風)},
  author = {宇田川 洋},
  year = {2006},
  doi = {10.24471/shigaku.115.7\_1257},
  language = {ain},
  url = {https://doi.org/10.24471/shigaku.115.7\_1257}
}