@book{1973okaiainugonyumondai1kai,
  title = {[第１回アイヌ語入門講座受講者感想文]},
  author = {岡井 隆一},
  year = {1973},
  language = {ain},
  url = {https://aterui.ws.hosei.ac.jp/togo/detail.php?id=5029\&domain=ainu}
}