State Department - certificate of appreciation (Charles Phelps Smyth assisted in preparation of the American Program at the Brussels Universal and International Exhibition held in 1958.), 1958 October

State Department - certificate of appreciation (Charles Phelps Smyth assisted in preparation of the American Program at the Brussels Universal and International Exhibition held in 1958.), 1958 October, Box: 4, Folder: 8. Papers of Charles Phelps Smyth, A93-02-002. Science History Institute Archives. https://sciencehistory.libraryhost.com/repositories/3/archival_objects/33123 Accessed November 25, 2024.