@book{ BA34435813,
  author    = "Centre for Environmental Studies (Great Britain) and Broadbent, Thomas Andrew",
  title     = "Activity analysis of spatial allocation models",
  publisher = "Centre for Environmental Studies",
  year      = "1973",
  series    = "Working papers",
  number    = "CES WP 82",
  URL       = "https://ci.nii.ac.jp/ncid/BA34435813"
}