United States. Department of the Treasury. "Operation of the Tariff of 1897, and Customs Administration," in United States. Department of the Treasury. "Annual Report of the Secretary of the Treasury on the State of the Finances for the Year 1897," Annual Report of the Secretary of the Treasury on the State of the Finances (1897) : 42-44. https://fraser.stlouisfed.org/title/194/item/5543/toc/407217 , accessed on March 28, 2024.