@book{ BA04716631,
  author    = "Cunningham, Brysson",
  title     = "Port economics : an elementary study of port affairs",
  publisher = "Sir Isaac Pitman",
  year      = "1926",
  series    = "Pitman's transport library",
  number    = "",
  URL       = "http://ci.nii.ac.jp/ncid/BA04716631"
}