Wages and Hours of Labor in the Petroleum Industry, 1920 : Bulletin of the United States Bureau of Labor Statistics, No. 297
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At head of title: U.S. Department of Labor, Bureau of Labor Statistics.
Issued also as House doc. 279, 67th Cong., 2d sess.
Government Printing Office
- lcc: HD8051 .A62 no.297
- sudocs: L 2.3:297
- oclc: 06353989