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a letter is written communications between two or more people
Collective bargaining is the process of negotiating terms of ... much more prevalent in the public sector, with 33.6% of these workers unionized,
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The Great Migration, sometimes known as the Great Northward Migration or the Black Migration, was the movement of 6 million African Americans out of the rural Southern United States to the urban Northeast, Midwest and West that occurred between 1916 and 1970.