Items

• [E1918AY], Letter from American Institute of Mining Engineers, Bradley Stoughton to Thomas Alva Edison, July 28th, 1919
  1919-07-28
• [E1918AZ], Letter from William Henry Meadowcroft to American Institute of Mining Engineers, Bradley Stoughton, July 30th, 1919
  1919-07-30
• [E1947BA], Letter from Walter Seeley Mallory to Thomas Alva Edison, June 18th, 1919
  1919-06-18