@book{ BA13265781,
  author    = "Tumin, Melvin Marvin",
  title     = "Social stratification : the forms and functions of inequality",
  publisher = "Prentice-Hall",
  year      = "1967",
  series    = "Prentice-Hall foundations of modern sociology series",
  number    = "",
  URL       = "https://ci.nii.ac.jp/ncid/BA13265781"
}