@book{ BB02059810,
  author    = "Ward-Perkins, J. B. (John Bryan) and Balling, Hertha",
  title     = "Rom",
  publisher = "Deutsche Verlags-Anstalt",
  year      = "1988",
  series    = "Weltgeschichte der Architektur",
  number    = "",
  URL       = "https://ci.nii.ac.jp/ncid/BB02059810"
}