"I must apologize for the delay in answering your recent letter. There is only one complete set of the Chinese Government Gazette in the Library of Congress which was sent to the bindery and detained there for several months......", 1961-06-07. 特藏中心.

"I must apologize for the delay in answering your recent letter. There is only one complete set of the Chinese Government Gazette in the Library of Congress which was sent to the bindery and detained there for several months......", 1961-06-07. 特藏中心. http://10.55.102.87:8081/repositories/2/archival_objects/33719 Accessed July 08, 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, “‘I Must Apologize for the Delay in Answering Your Recent Letter. There Is Only One Complete Set of the Chinese Government Gazette in the Library of Congress Which Was Sent to the Bindery and Detained There for Several Months......", 1961-06-07,” ., accessed July 8, 2025, http://10.55.102.87:8081/repositories/2/archival_objects/33719.

顾维钧, 1888－1985. "I Must Apologize for the Delay in Answering Your Recent Letter. There Is Only One Complete Set of the Chinese Government Gazette in the Library of Congress Which Was Sent to the Bindery and Detained There for Several Months......", 1961-06-07[Z/OL]([no date])[2025–07–08]. http://10.55.102.87:8081/repositories/2/archival_objects/33719.