United States. Department of the Treasury. "Tables - Personnel," in United States. Department of the Treasury. "Annual Report of the Secretary of the Treasury on the State of the Finances for the Fiscal Year Ended June 30, 1968 : Statistical Appendix," Annual Report of the Secretary of the Treasury on the State of the Finances (Fiscal Year Ended June 30, 1968) : 350-350. https://fraser.stlouisfed.org/title/194/item/5603/toc/207574 , accessed on March 29, 2024.