01079cam a22002771 4500 l 31000043 DLC 20260227111533.0 910920s1931 dcua f000 0 eng c l 31000043 (OCoLC)24423996 Library U.S. Dept. of Labor CLU CLU DLC premarc HD8051 .A62 no. 525 United States. Bureau of Labor Statistics. Wages and hours of labor in the Portland cement industry, 1929 ... January, 1931. Washington, U.S. Govt. Print. Off., 1931. iii, 62 p. incl. tables. 23 cm. Bulletin of the United States Bureau of Labor Statistics, no. 525 Wages and hours of labor series At head of title: United States Department of Labor. W.N. Doak, secretary. Bureau of Labor Statistics. Ethelbert Stewart, commissioner. Issued also as House doc. 579, 71st Cong., 3 sess. Wages United States. Hours of labor. Portland cement. 36008 36008