April 27, 1904
Letter from Heinrich Haas to Eugen Klee, April 27, 1904.
Eugen and Emma Klee Papers
Joseph P. Horner Memorial Library
“Heinrich Haas to Eugen Klee, April 27, 1904.” Eugen and Emma Klee Papers, Joseph P. Horner Memorial Library, accessed from German Heritage in Letters, September 22, 2021, https://germanletters.org/items/show/1326