Board of Governors of the Federal Reserve System (U.S.), 1935-
and Federal Reserve Board, 1914-1935. Commodity Futures -- Contract Specifications Regarding Deliveries, Number X-6412, Volume 31, Page 199,
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/503831, accessed on May 12, 2026.