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This act provided an absolute 10-year moratorium on Chinese labor immigration. For the first time, Federal law proscribed entry of an ethnic working group on the premise that it endangered the good order of certain localities.
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In the 1920s, another 800,000 blacks left the south
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398,000 blacks in the 1930s immigrated
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Between 1940 and 1960 over 3,348,000 blacks left the south for northern and western cities.
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A limit of 170,000 immigrants from outside the Western Hemisphere could enter the United States, with a maximum of 20,000 from any one country.