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| Date: | 01 18 1961 |
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| Description: | The farm workers picket line near El Centro during the important Imperial Valley lettuce strike. |
| Date: | 1967 |
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| Description: | Dump where discarded mattresses were resold to growers for migrant laborer camp use. A sign identifying the dump and its hours stands behind a barbed wire ... |
| Date: | 1970 |
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| Description: | Migrant farm workers harvesting tomatoes in the Rio Grande Valley. Obreros Unidos (United Workers) grew in Wisconsin during the 1960s and had deep roots ... |
| Date: | 08 24 1967 |
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| Description: | Elevated view of 150 workers rallying as a part of Obreros Unidos (United Workers) protest against poor working conditions of migrant farm workers in the S... |
| Date: | 1969 |
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| Description: | Site of Libby McNeil and Libby canning company. In 1968, workers in Hartford staged a walkout to support Obreros Unidos (United Workers) to show dissatisfa... |
| Date: | 1966 |
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| Description: | A series of images from a contact sheet containing scenes of Obreros Unidos (United Workers) leaving Wautoma and marching towards Madison along Highway 21 ... |
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