@book{1971shichiromurayamakitachishimaainugobunkengakutekikenkyutheain,
  title = {Kita Chishima Ainugo: bunkengakuteki kenkyū (The Ainu language of the Northern Kuriles)},
  author = {Shichirō Murayama},
  year = {1971},
  language = {ain},
  url = {https://glottolog.org/resource/reference/id/471654}
}