Williams, Pearl Ravner and United States. Bureau of Labor Statistics. Price Perspective: 1965, 1966, 1967 : Bulletin of the United States Bureau of Labor Statistics, No. 1543 , Washington, D.C: For sale by the Supt. of Docs., U.S. G.P.O., May 1968, https://fraser.stlouisfed.org/title/4816, accessed on October 14, 2024.