United States. Bureau of Economic Analysis. "Merchandise Trade in the First Quarter, 1972 : Balance of Payments Basis, BEA 72-30,"
Bureau of Economic Analysis (BEA) News Releases
(April 27, 1972).
https://fraser.stlouisfed.org/title/6148/item/595316, accessed on March 22, 2025.
@FedFRASER