based on the National standards for steamfitting apprentship National Joint Steamfitting Apprenticeship Committee creator United States Federal Committee on Apprenticeship. Heating, Piping and Air Conditioning Contractors National Association United Association of Journeymen Plumbers and Steamfitters of the United States and Canada text dcu Washington U.S. Govt. Print. Off. 1940 monographic eng

print

ix, 15 p. facsims. 27 cm. Prepared by National Joint Steamfitting Apprenticeship Committee, in cooperation with Federal Committee on Apprenticeship, approved by Heating, Piping, and Air Conditioning Contractor's National Association and the United Association of Journeymen Plumbers and Steamfitters. At head of title: United States Department of Labor. Frances Perkins, secretary. Division of Labor Standards. V. A. Zimmer, director. Part I of Bulletin no. 28 has title: National standards for steamfitting apprenticeship. Apprentices United States Pipe fitting HD4885.U5 N282 l 40000102 U.S. Dept. of labor. Libr. 800319 20260227111537.0 l 40000102