United States. Works Progress Administration. "6-Year Road Total Reaches 600,000 Miles; Buildings, Utilities, Sanitation Feature Gains in WPA Accomplishments : November 2, 1941, 4-2287,"
Press Releases of the Works Progress Administration
(November 2, 1941).
https://fraser.stlouisfed.org/title/6753/item/620010, accessed on June 17, 2026.