Johnson, Richard N. Letter to George W. Burgess, Box 13, Folder 4, William McChesney Martin, Jr., Papers. https://fraser.stlouisfed.org/archival/1341/item/456893, accessed on August 17, 2018.
Regarding anticipated capital expenditures for foreign commercial air transportation
- Board of Governors of the Federal Reserve System, Federal Reserve Board
- Meltzer's History of the Federal Reserve - Primary Sources