@book{ BA08021471,
  author    = "Orban, Balint J. (Balint Joseph) and Grant, Daniel A.",
  title     = "Orban's periodontics : a concept--theory and practice",
  publisher = "Mosby",
  year      = "1968",
  edition   = "3d ed",
  URL       = "https://ci.nii.ac.jp/ncid/BA08021471"
}