@book{han-nom-d8-bgcv-h920,
  title = {Địa lý tiện lãm 地理便覽},
  author = {Gao, Pian},
  url = {https://www.viet-dien.com/t/han-nom-d8-bgcv-h920/2},
  pages = {2},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-05},
}