@article{2001katayamanippongoainugo,
  title = {日本語とアイヌ語--二つの言語は昔兄弟でした},
  author = {片山 龍峯},
  year = {2001},
  journal = {まなぶ},
  language = {ain},
  url = {https://cir.nii.ac.jp/crid/1520010380352888064}
}