01251cam a22002411 4500 l 39000043 DLC 20260227111536.0 800319s1939 dcuh f000 0 eng c l 39000043 (OCoLC)6104956 U.S. Dept. of labor. Libr. NBuU DLC premarc HD4885.U5 N28 National Joint Steamfitting Apprenticeship Committee. National standards for steamfitting apprenticeship including suggestions for putting national standards into operation in local communities. Prepared by National Joint Steamfitting Apprenticeship Committee, in cooperation with Federal Committee on Apprenticeship, approved by Heating, Piping, and Air Conditioning Contractors' National Association and the United Association of Journeyman Plumbers and Steamfitters. Washington, U.S. Govt. Print. Off., 1939. v, 11 p. incl. facsims. 27 cm. [U.S. Dept. of Labor. Division of Labor Standards] Bulletin no. 28 At head of title: United States Dept. of Labor ... Division of Labor Standards. Apprentices United States. United States. Federal Committee on Apprenticeship. 36289 36289