Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. Letter From Governor, re Tax on Parcel Post Packages of 25¢, or More. Federal Reserve Banks Subject to Same, Number X-592, Volume 6, Page 3083, Mimeograph Letters and Statements of the Board. Board of Governors of the Federal Reserve System (U.S.), 1935-. https://fraser.stlouisfed.org/archival/4957/item/510860, accessed on March 7, 2026.