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Source Timeline
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6. Bermingham, John. “Immigration: Not a Solution to Problems of Population Decline and Aging.” Springer. Kluwer Academic Publishers-Plenum Publishers
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4. Coppel, J., J. Dumont and I. Visco (2001), “Trends in Immigration and Economic Consequences”, OECD Economics Department Working Papers, No. 284, OECD Publishing.
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2. Borjas, George. Freeman, Richard. “Immigration and the Work Force: Economic Consequences for the United States.”
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1. Card, David. Inman, Robert. “Making Cities Work: Prospects and Policies for Urban America.” PP 156-161. Print. 12 September, 2015.
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7. Hoefer, Michael. Rytina, Nancy. Baker, Bryan. “Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2011
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3. Hollifield, James. Orrenius, Pia. Martin, Phillip. “Controlling Immigration: A Global Perspective, Third Edition