File:Union membership in us 1930-2010.png
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Union_membership_in_us_1930-2010.png (752 × 452 pixels, file size: 24 KB, MIME type: image/png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:33, 25 March 2012 | ![]() | 752 × 452 (24 KB) | commons>Louis P. Boog |
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