@book{han-nom-d8-xc6s-ng86,
  title = {Địa lý gia truyền 地理家傳},
  url = {https://www.viet-dien.com/t/han-nom-d8-xc6s-ng86},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-07},
}