@book{1970fredccpengagrammarofainunumbernames,
  title = {A grammar of Ainu number names},
  author = {Fred C.C. Peng},
  year = {1970},
  doi = {10.1016/0024-3841(70)90047-1},
  language = {ain},
  url = {https://doi.org/10.1016/0024-3841(70)90047-1}
}