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En este periodo se destacan sus investigaciones a la cuestión de la inmigración y la integración de los inmigrantes en la sociedad norteamericana. (1 Jan 1915 Jahr – 1 Jan 1935 Jahr)

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ByAndrés Pemberty Gutierrez
14 Nov 2017
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Datum:

1 Jan 1915 Jahr
1 Jan 1935 Jahr
~ 20 years
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