@book{han-nom-d8-jrzg-n623,
  title = {Địa lý Tả Ao di thư chân truyền chính pháp 地理左泑遺書真傳正法},
  year = {1918},
  publisher = {Liễu Văn Đường: Vietnam},
  url = {https://viet-dien.com/t/han-nom-d8-jrzg-n623/6},
  pages = {6},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-12},
}