@book{ BA63008634,
  author    = "I︠A︡dov, V. A. and Ivanov, Vilen Nikolaevich",
  title     = "Социологическое исследование : методология, программа, методы",
  publisher = ""Наука"",
  year      = "1972",
  URL       = "https://ci.nii.ac.jp/ncid/BA63008634"
}