United States. Federal Open Market Committee. "Meeting, May 6, 1958 : Historical Minutes," Federal Open Market Committee Meeting Minutes, Transcripts, and Other Documents (May 6, 1958). https://fraser.stlouisfed.org/title/677/item/23408/content/pdf/fomchistmin19580506, accessed on August 5, 2020.
This collection of meeting documents contains a memo released by FOIA request.
Board of Governors of the Federal Reserve System