United States. Bureau of Economic Analysis. "Selected Data on U.S. International Transactions : Fourth Quarter and Year 1977, BEA 78-12,"
Bureau of Economic Analysis (BEA) News Releases
(February 16, 1978).
https://fraser.stlouisfed.org/title/6148/item/595723, accessed on March 21, 2025.
@FedFRASER