@book{ BA45891767,
  author    = "Haring, Joen Iannucci and Jansen, Laura",
  title     = "Dental radiography : principles and techniques",
  publisher = "W. B. Saunders",
  year      = "2000",
  edition   = "2nd ed.",
  URL       = "http://ci.nii.ac.jp/ncid/BA45891767"
}