Progress and uniformity in child-labor legislation : a study in statistical measurement
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| Institution: | CEDIAS-Musée social |
| Format: | TEXT |
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Columbia university (New York)
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| Online Access: | http://hdl.handle.net/11160/761E7725-2949-4B6C-8AF1-DC7C4882F186 |
| Published: | 1912 |
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