Hetzel, Robert L.
and Partee, J. Charles, 1927-2007. J. Charles Partee Interview : Transcript, June 3, 1998,
Robert Hetzel Oral History Collection.
https://fraser.stlouisfed.org/archival/4927/item/501771/content/pdf/partee_j_19980603, accessed on January 14, 2026.