@book{ BA03426975,
  author    = "Tomberg, Alex",
  title     = "Data bases in Europe : a directory to machine-readable data bases and data banks in Europe",
  publisher = "Aslib",
  year      = "1976",
  series    = "European user series",
  number    = "1",
  URL       = "http://ci.nii.ac.jp/ncid/BA03426975"
}