@book{1996kirstenearlyeuropeanwritingsainulanguage,
  title = {Early European Writings on the Ainu Language},
  author = {Kirsten Refsing and John Batchelor and Basil Hall Chamberlain and Bronisław Piłsudski},
  year = {1996},
  language = {ain},
  url = {https://ci.nii.ac.jp/ncid/BA28625246}
}