United States. Bureau of Labor Statistics. "BLS Handbook of Methods: The Consumer Price Index, Volume II : Bulletin of the United States Bureau of Labor Statistics, No. 2134-2" in BLS Handbook of Methods : Bulletin of the United States Bureau of Labor Statistics, No. 2134 (April 1984). https://fraser.stlouisfed.org/title/5238/item/529770, accessed on February 3, 2025.