United States. Bureau of Labor Statistics. "Industry Wage Survey: Pulp, Paper, and Paperboard Mills, October 1967 : Bulletin of the United States Bureau of Labor Statistics, No. 1608,"
Industry Wage Survey: Pulp, Paper, and Paperboard Mills
(1968).
https://fraser.stlouisfed.org/title/4627/item/498433, accessed on February 13, 2025.