Memo, Walter Heller to William McC. Martin, Box 19, . John F. Kennedy Library. https://fraser.stlouisfed.org/archival/1197/item/3561, accessed on April 23, 2024.
Memo, Walter Heller to William McC. Martin, Box 19, . John F. Kennedy Library. https://fraser.stlouisfed.org/archival/1197/item/3561, accessed on April 23, 2024.