Walter Koch correspondence (HC.MC.950.146), Quaker & Special Collections, Haverford College, Haverford, PA.
Walter Koch correspondence (HC.MC.950.146), Quaker & Special Collections, Haverford College, Haverford, PA. https://archives.tricolib.brynmawr.edu//repositories/5/resources/1356 Accessed February 17, 2025.
