Los puntos clave no están disponibles para este artículo en este momento.
Jeffrey S. Passel, Karen A. Woodrow, Geographic Distribution of Undocumented Immigrants: Estimates of Undocumented Aliens Counted in the 1980 Census by State, The International Migration Review, Vol. 18, No. 3, Special Issue: Irregular Migration: An International Perspective (Autumn, 1984), pp. 642-671
Passel et al. (Sun,) studied this question.