Items

• [E1245AI], Letter from Heitman (H.E.) Co to Thomas Alva Edison, September 12th, 1912
  1912-09-12
• [E1747AB], Report from Heitman (H.E.) Co, March 1917
  1917-03-00
• [F5F01BAH], Letter from Heitman (H.E.) Co, Harvie Earnhardt Heitman to Mina Miller (Mrs Thomas A.) Edison, November 23rd, 1912
  1912-11-23