Items

• [E1929CF], Letter from Dr U Y Yen, China. Ministry of Education. Educational Bureau to Thomas Alva Edison, July 24th, 1919
  1919-07-24
• [E1929CN], Letter from William Henry Meadowcroft to China. Ministry of Education. Educational Bureau, Dr U Y Yen, July 28th, 1919
  1919-07-28
• [E1929FB], Letter from Thomas Alva Edison to China. Ministry of Education. Educational Bureau, Dr U Y Yen, September 25th, 1919
  1919-09-25
• [E1929FC], Letter from China. Ministry of Education. Educational Bureau, Dr U Y Yen to Thomas Alva Edison, September 30th, 1919
  1919-09-30
• [E1929FD], Letter from Thomas Alva Edison to China. Ministry of Education. Educational Bureau, Dr U Y Yen, October 6th, 1919
  1919-10-06
• [NB254A80], Technical Note, Elmer Ellsworth Dougherty, January 9th, 1920
  1920-01-09
• [NB254BAD], Technical Note, Elmer Ellsworth Dougherty, February 19th, 1920
  1920-02-19
• [NP119075], Diary, Thomas Alva Edison, July 18th, 1919
  1919-07-18
• [NP120125], Diary, Thomas Alva Edison, December 1919
  1919-12-00
• [NP121022] Diary, 1919-1920
  1919-1920
• [PT5125A], Technical Note, Thomas Alva Edison, September 12th, 1921
  1921-09-12
• [PT5125C] Memorandum, 1921-1922
  1921-1922