Columbia subject headings:
Harvard subject headings:
Castro, Américo, 1885-1972--Anniversaries, etc.
Castro, Américo, 1885-1972--Bibliography.
Spain--Civilization--Historiography--Bibliography.
Spain--Civilization--Historiography.
Princeton subject headings:
Castro, Américo, 1885-1972--Bibliography.
Castro, Américo, 1885-1972--Influence.