@book{sokolova1983,
  address = {Moscow},
  author  = {Sokolova, Z. P.},
  key     = {Sokolova (1983)},
  title   = {Sotsial'naja organizatsija hantov i mansi v 18-19 vv. (Khanty and Mansi Social Organization in the Eighteenth and Nineteenth Centuries)},
  year    = {1983}
}