Leonhard Friedrich papers (HC.MC.950.071), Quaker & Special Collections, Haverford College, Haverford, PA.
Leonhard Friedrich papers (HC.MC.950.071), Quaker & Special Collections, Haverford College, Haverford, PA. https://archives.tricolib.brynmawr.edu//repositories/5/resources/1413 Accessed April 19, 2024.
