Wages and Hours of Labor in the Portland Cement Industry, 1929 : Bulletin of the United States Bureau of Labor Statistics, No. 525
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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.
U.S. Govt. Print. Off.
- lcc: HD8051 .A62 no.525
- sudocs: L 2.3:525
- oclc: 24423996