@book{han-nom-d8-ss98-tg33,
  title = {Thiên Nam tứ tự kinh 天南四字經},
  url = {https://www.viet-dien.com/t/han-nom-d8-ss98-tg33},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-08},
}