00750cam a22002171 4500 l 63000039 DLC 20260227111547.0 731231s1963 dcua f000 0 eng c l 63000039 (OCoLC)768315 U.S. Dept. of Labor Library NhD OCoLC DLC premarc HD4835.U4 A5 1963a United States. Department of Labor. Challenge and change, a brief history [of the U.S. Department of Labor, 1913-1963. Washington, For sale by the Superintendent of Documents, U.S. Govt. Print. Off., 1963] iii, 72 p. illus. 26 cm. Errata leaf inserted. United States. Department of Labor. 37109 37109