Letter from Rudolph Singer, Stuttgart, Germany, to Wallace Rindskopf, University City, Missouri, August 7, 1938, A3026-00043. Missouri Historical Society Library and Research Center.

Letter from Rudolph Singer, Stuttgart, Germany, to Wallace Rindskopf, University City, Missouri, August 7, 1938, A3026-00043. Missouri Historical Society Library and Research Center. https://mohistory.mobiusconsortium.org/repositories/2/digital_objects/15788 Accessed September 20, 2024.