Letter from the Chief of Ba Xuyên Province, Republic of Vietnam to Captain Hall, inviting him to attend the celebration of President Ngo Dinh Diem's birthday.
Ba Xuyên Province Chief
Letter from T.L. Tinh-Truong to Captain Hall, 22730107001. No Date, Box 01, Folder 07, 121st Aviation Association Collection, Vietnam Center and Sam Johnson Vietnam Archive, Texas Tech University, <a rel="nofollow" class="external free" href="https://www.vietnam.ttu.edu/virtualarchive/items.php?item=22730107001">https://www.vietnam.ttu.edu/virtualarchive/items.php?item=22730107001</a>, Accessed 12 May 2023.