2006-udagawa-chashi-ezo-kita-chishima-chosaho-bun:
  type: article
  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"
  date: 2006
  serial-number:
    doi: "10.24471/shigaku.115.7_1257"
  url: "https://doi.org/10.24471/shigaku.115.7_1257"
  language: "ain"
