United States. Bureau of Labor Statistics. Wage Chronology: North Atlantic Shipping Associations and the International Longshoremen's Association (ILA), 1934-80 : Bulletin of the United States Bureau of Labor Statistics, No. 2063 , Washington, D.C: The Bureau, June 1980, https://fraser.stlouisfed.org/title/4898, accessed on November 14, 2024.