Items

• [E1401D], Letter from Gundlach Advertising Co to Charles Edwin Goodwin, Phonograph Corporation of Manhattan, October 7th, 1914
  1914-10-07
• [E1565ME], Letter from E T Gundlach, Gundlach Advertising Co to Thomas Alva Edison, September 14th, 1915
  1915-09-14
• [E1701AF], Letter from E T Gundlach, Gundlach Advertising Co to Thomas Alva Edison, April 30th, 1917
  1917-04-30