Hallamaa, Panu.
Senri Ethnological Studies ; no. 44 - Osaka-JA : National Museum of Ethnology, 1997. - p. 187-223 : il. - Irregular - No. 44, (1997) - Senri Ethnological Studies ; no. 44 . - Japón. National Museum of Ethnology. .
Northern Minority Languages. Problems of Survival.
Senri Ethnological Studies ; no. 44 - Osaka-JA : National Museum of Ethnology, 1997. - p. 187-223 : il. - Irregular - No. 44, (1997) - Senri Ethnological Studies ; no. 44 . - Japón. National Museum of Ethnology. .
Northern Minority Languages. Problems of Survival.