ID:DA13328050
Clopper, Edward N.
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Edward Nicholas Clopper
Arno Press 1974, [c1912] Children and youth : social problems and social policy
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by the National Child Labor Committee based upon conditions in West Virginia ; under the direction of Edward N. Clopper ; photographic illustrations by Lewis W. Hine
Macmillan 1922
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[director] Edward N. Clopper
National Child Labor Committee c1918
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