Columbia subject headings:
Exiles--History.
Science--History.
Spaniards--History.
Harvard subject headings:
Exiles--History.
Science--History
Science--Spain--History--20th century--Congresses.
Scientists--Spain--Biography--Congresses.
Scientists--Spain--History--20th century--Congresses.
Scientists--Venezuela--Spanish--History--Congresses.
Spain--Exiles--History--20th century--Congresses.
Spaniards--History.
Princeton subject headings:
Exiles--History.
Science--History.
Spaniards--History.