@book{ BA01549690, author = "Gurvich, Ilʹi︠a︡ Samoĭlovich and Institut ėtnografii imeni N.N. Miklukho-Maklai︠a︡", title = "Этническое развитие народностей Севера в советский период", publisher = ""Наука"", year = "1987", URL = "https://ci.nii.ac.jp/ncid/BA01549690" }