Brief history of the American labor movement United States Departmen of Labor
D.C. U.S. Department of Labor , 1957
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Orren, Karen
Belated feudalism : labor, the law, and liberal development in the United States
Cambridge University Press, 1991
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Cold formed machine bolts and hexagon nuts United States Department of Labor
S.l. The Foreign Operations Administration 1953,
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Harlow, Ralph Volney
The United States
Holt, Rinehart and Wiston, 1961
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Harlow, Ralph Volney
The United States
Holt, Rinehart and Wiston, 1961
 Buku Teks