Board of Governors of the Federal Reserve System (U.S.), 1935- and Szymczak, M. S. "Recorded Interview for Radio Free Europe, Washington, D.C.." April 11, 1951, https://fraser.stlouisfed.org/scribd/?item_id=475737&filepath=/files/docs/historical/federal reserve history/bog_members_statements/szymczak_19510411.pdf&start_page=1, accessed on September 24, 2017.
Interview was recorded in Polish
- Statements and Speeches of Federal Open Market Committee Participants
- Statements and Speeches of Federal Reserve Officials
- Statements and Speeches of Members of the Board of Governors of the Federal Reserve System