United States. Works Progress Administration. "WPA Begins "Report to Nation", Listing 450,000 Miles of Roads and Streets Built or Improved, Vast Extension of Airports and Airways : March 19, 1940, 4-2103,"
Press Releases of the Works Progress Administration
(March 19, 1940).
https://fraser.stlouisfed.org/title/6753/item/619900, accessed on June 13, 2026.