United States. Bureau of Labor Statistics. "Wage Chronology: Commonwealth Edison Company of Chicago and International Brotherhood of Electrical Workers, October 1945-March 1974 : Bulletin of the United States Bureau of Labor Statistics, No. 1808," Wage Chronology: Commonwealth Edison Company of Chicago and International Brotherhood of Electrical Workers (1974). https://fraser.stlouisfed.org/title/4877/item/499052, accessed on December 5, 2024.