This primary source comes from the Collection HST-SVP: Harry S. Truman Papers as U.S. Senator and Vice President.
Full Citation: Speech of Senator Harry S. Truman before the National Colored Democratic Association, Chicago, Illinois; 7/14/1940; Press Release File July 14, 1940 - Convention of the National Colored Democratic Association, Chicago, Illinois; Speech Files, 1935 - 1945; Collection HST-SVP: Harry S. Truman Papers as U.S. Senator and Vice President; Harry S. Truman Library, Independence, MO. [Online Version, https://www.docsteach.org/documents/document/trumans-speech-to-the-national-colored-democratic-association, April 28, 2024]