@book{ BA87791237,
  author    = "Hess, Gary R.",
  title     = "Vietnam : explaining America's lost war",
  publisher = "Blackwell Pub.",
  year      = "2009",
  series    = "Contesting the past",
  number    = "",
  URL       = "http://ci.nii.ac.jp/ncid/BA87791237"
}