[张谦所写的关于唐宝璋英年早逝的来信] Letter from Henry Chang on the passing of Isabel Tang, April 22, undated, Digital File: Koo_Box_0289, Folder: 13. 特藏中心.

[张谦所写的关于唐宝璋英年早逝的来信] Letter from Henry Chang on the passing of Isabel Tang, April 22, undated, Digital File: Koo_Box_0289, Folder: 13. 特藏中心. http://10.55.102.87:8081/repositories/2/archival_objects/10973 Accessed June 18, 2025.

(顾维钧, 1888－1985)

(顾维钧, 1888－1985, n.d.)

(顾维钧, 1888－1985, n.d.)

顾维钧, 1888－1985, “[张谦所写的关于唐宝璋英年早逝的来信] Letter from Henry Chang on the Passing of Isabel Tang, April 22, Undated,” , Digital File: Koo_Box_0289, Folder: 13., accessed June 18, 2025, http://10.55.102.87:8081/repositories/2/archival_objects/10973.

顾维钧, 1888－1985. [张谦所写的关于唐宝璋英年早逝的来信] Letter from Henry Chang on the Passing of Isabel Tang, April 22, Undated[Z/OL]([no date])[2025–06–18]. http://10.55.102.87:8081/repositories/2/archival_objects/10973.