@book{ BA14232697,
  author    = "Sorokin, Pitirim Aleksandrovich",
  title     = "Social and cultural mobility",
  publisher = "Free Press",
  year      = "1964",
  series    = "A Free Press paperback",
  number    = "",
  URL       = "https://ci.nii.ac.jp/ncid/BA14232697"
}