Average Workweek, Manufacturing - 21 Industries
United States. Bureau of the Census. "Average Workweek, Manufacturing - 21 Industries," in United States. Bureau of the Census. "October 1961," Business Conditions Digest (October 1961) : 42-42. https://fraser.stlouisfed.org/title/43/item/7172/toc/299586 , accessed on March 28, 2024.