@book{han-nom-d8-6e0m-ym07,
  title = {Cao Biền tấu thư địa cảo 高駢奏書地稿},
  author = {Gao, Pian},
  url = {https://viet-dien.com/t/han-nom-d8-6e0m-ym07/7},
  pages = {7},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-12},
}