查詢 text:"Child labor Health aspects -- Government policy -- United States." ，共 1 筆
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6 0 0 0 0Protecting youth at work :health, safety, and development of working children and adolescents in the United States
- 作者: National Research Council (U.S.).
- 出版: Washington, D.C. : National Academy Press 1998.
- 資料類型: 電子書