@book{ BA68495259,
  author    = "新田, 一郎 ",
  title     = "中世に国家はあったか",
  publisher = "山川出版社",
  year      = "2004",
  series    = "日本史リブレット",
  number    = "19",
  URL       = "https://ci.nii.ac.jp/ncid/BA68495259"
}