@book{han-nom-d8-2ybj-hx88,
  title = {Khải đồng thuyết ước 啓童説約},
  author = {Phạm, Phục Trai},
  year = {1853},
  url = {https://viet-dien.com/t/han-nom-d8-2ybj-hx88/16},
  pages = {16},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-18},
}