por Seong, Somi | Popper, Steven W | Zheng, Kungang.
por Larson, Eric V | Levin, Norman D | Baik, Seonhae | Savych, Bogdan.
por Vernez, Georges.
por Rolph, Elizabeth S | Rand Corporation | Program for Research on Immigration Policy (U.S.).
por Rand McNally and Company.
por Malinvaud, Edmond.