@book{han-nom-d8-agw9-z440,
  title = {Kinh Bắc phong thổ diễn quốc sự 京北風土演國事},
  url = {https://viet-dien.com/t/han-nom-d8-agw9-z440/10},
  pages = {10},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-12},
}