United States. Bureau of the Census. "Occupations" in Statistical Atlas of the United States, 1880 (). https://fraser.stlouisfed.org/title/5586/item/574143, accessed on March 29, 2024.
United States. Bureau of the Census. "Occupations" in Statistical Atlas of the United States, 1880 (). https://fraser.stlouisfed.org/title/5586/item/574143, accessed on March 29, 2024.