United States. Bureau of Labor Statistics. "Consumer Expenditure Survey: Interview Survey, 1972-73, Volume 1: U.S. Tables" in Consumer Expenditure Survey: Interview Survey, 1972-73 : Bulletin of the United States Bureau of Labor Statistics, No. 1997 (1978). https://fraser.stlouisfed.org/title/4689/item/499652, accessed on November 17, 2024.