@book{ BA24809076,
  author    = "Willis, Jeffrey",
  title     = "Design issues for urban and regional information systems",
  publisher = "Centre for Environmental Studies",
  year      = "1972",
  series    = "Working papers",
  number    = "CES WP 71",
  URL       = "https://ci.nii.ac.jp/ncid/BA24809076"
}