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charles e gibbons

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Charles E. Gibbons · National Child Labor Committee

30 sayfa · 1927

Child labor / Compulsory Education / Education, Compulsory / School attendance

Charles E. Gibbons · National Child Labor Committee

66 sayfa · 1931

Child labor / School attendance

Charles E. Gibbons · National Child Labor Committee

124 sayfa · 1925

Child labor / History

Charles E. Gibbons · National Child Labor Committee

36 sayfa · 1929

Child labor

Charles E. Gibbons, Barbara Stokes · National Child Labor Committee

31 sayfa · 1938

Child labor / Miners / Barite

16 sayfa · 1928

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