United States. Bureau of Economic Analysis. "Metropolitan and Nonmetropolitan Nonfarm Personal Income, 1969-73, BEA 77-02,"
Bureau of Economic Analysis (BEA) News Releases
(January 19, 1977).
https://fraser.stlouisfed.org/title/6148/item/595617, accessed on March 22, 2025.
@FedFRASER