@book{han-nom-d8-hypc-qp25,
  title = {Mai Sơn ngâm thảo 梅山吟草},
  author = {Nguyẽ̂n, Thượng Hiè̂n},
  year = {1898},
  url = {https://www.viet-dien.com/t/han-nom-d8-hypc-qp25},
  note = {held by Columbia University Libraries},
  urldate = {2026-09-06},
}