Columbia subject headings:
Brain drain--Mexico.
Brain drain--United States.
Sandoval Vallarta, Manuel, 1899-1977.
Science--International cooperation--Latin America.
Science--International cooperation--United States.
Scientists--Mexico--History.
Harvard subject headings:
Brain drain--Mexico.
Brain drain--United States.
Sandoval Vallarta, Manuel, 1899-1977
Science--International cooperation--Latin America.
Science--International cooperation--United States.
Scientists--Mexico--History.
Princeton subject headings:
Brain drain--Mexico.
Brain drain--United States.
Sandoval Vallarta, Manuel, 1899-1977.
Science--Latin America--International cooperation.
Science--United States--International cooperation.
Scientists--Mexico--History.