Directory of National Unions and Employee Associations, 1975 : Bulletin : Bulletin of the United States Bureau of Labor Statistics, No. 1937
United States. Bureau of Labor Statistics. "Directory of National Unions and Employee Associations, 1975 : Bulletin : Bulletin of the United States Bureau of Labor Statistics, No. 1937," Directory of National Unions and Employee Associations (1977). https://fraser.stlouisfed.org/title/4410/item/499306/content/pdf/bls_1937_1977, accessed on May 6, 2024.