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1
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2Published 1999“…United States Emigration and immigration Economic aspects.…”
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3by Simon, Julian Lincoln, 1932-1998“…United States Emigration and immigration Economic aspects. sh2007100167…”
Published 1989
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4by Borjas, George J.“…United States Emigration and immigration Economic aspects. sh2007100167…”
Published 1990
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5