United States. Bureau of Labor Statistics. "Occupational Injuries and Illnesses in the United States by Industry, 1977 : Bulletin of the United States Bureau of Labor Statistics, No. 2047,"
Occupational Injuries and Illnesses in the United States by Industry
(1980).
https://fraser.stlouisfed.org/title/4793/item/499540, accessed on March 22, 2025.