Letter from Rudolf Singer to Wallace Rindskopf, University City, Missouri, July 9, 1938, A3026-00032. Missouri Historical Society Library and Research Center.

Letter from Rudolf Singer to Wallace Rindskopf, University City, Missouri, July 9, 1938, A3026-00032. Missouri Historical Society Library and Research Center. https://mohistory.mobiusconsortium.org/repositories/2/digital_objects/15777 Accessed September 19, 2024.