This primary source comes from the Collection RN-WHPO: White House Photo Office Collection (Nixon Administration).
National Archives Identifier:
194421Full Citation: President and Mrs. Nixon visit the Great Wall of China and the Ming tombs; 2/24/1972; Collection RN-WHPO: White House Photo Office Collection (Nixon Administration). [Online Version, https://docsteach.org/documents/document/president-and-mrs-nixon-visit-the-great-wall-of-china-and-the-ming-tombs, February 9, 2025]