July 1, 1911
Letter from Eugen Haas to Eugen Klee, July 1, 1911. Eugen Haas was the nephew of Eugen Klee.
Eugen Klee Papers
Historical Society of Pennsylvania
“Eugen Haas to Eugen Klee, July 1, 1911.” Eugen Klee Papers, Historical Society of Pennsylvania, accessed from German Heritage in Letters, September 27, 2020, https://germanletters.org/items/show/1785