United States. Bureau of Economic Analysis. "Merchandise Trade in the Fourth Quarter, 1971 : Balance of Payments Basis, BEA 72-7,"
Bureau of Economic Analysis (BEA) News Releases
(January 25, 1972).
https://fraser.stlouisfed.org/title/6148/item/595289, accessed on March 24, 2025.
@FedFRASER