United States. Bureau of Labor Statistics. "Directory of National and International Labor Unions in the United States, 1969. Supp. 1 (1970); Supp. 2 (1971) : Bulletin of the United States Bureau of Labor Statistics, No. 1665," Directory of National Unions and Employee Associations (1970). https://fraser.stlouisfed.org/title/4410/item/498648, accessed on December 21, 2024.