Directory of National and International Labor Unions in the United States, 1957 : Bulletin of the United States Bureau of Labor Statistics, No. 1222
United States. Bureau of Labor Statistics. "Directory of National and International Labor Unions in the United States, 1957 : Bulletin of the United States Bureau of Labor Statistics, No. 1222," Directory of National Unions and Employee Associations (November 1957). https://fraser.stlouisfed.org/title/4410/item/495724, accessed on April 23, 2024.