State child-labor standards : a State-by-State summary of laws affecting the employment of minors under 18 years of age
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書誌事項
State child-labor standards : a State-by-State summary of laws affecting the employment of minors under 18 years of age
(Bulletin / Bureau of Labor Standards, no. 114)
U.S. Dept. of Labor. Bureau of Labor Standards, 1949
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