Mr. Joannès Dupraz and Prince Bửu Lộc. Mr. Dupraz was visiting the stand of the State of Vietnam during the Paris Expo, 1953.
the State of Vietnam
<a rel="nofollow" class="external text" href="https://books.google.com/books?id=lD0uAQAAIAAJ">Bulletin du Viet Nam</a>, No51, page 15.