Hetzel, Robert L. and Leach, Ralph F. Ralph Leach Interview : Audio Interview, November 28, 1994, Robert Hetzel Oral History Collection. https://fraser.stlouisfed.org/archival/4927/item/501758/content/mp3/leach_r_19941128, accessed on May 4, 2024.
Hetzel, Robert L. and Leach, Ralph F. Ralph Leach Interview : Audio Interview, November 28, 1994, Robert Hetzel Oral History Collection. https://fraser.stlouisfed.org/archival/4927/item/501758/content/mp3/leach_r_19941128, accessed on May 4, 2024.