Columbia subject headings:
Harvard subject headings:
Education--Spain--History--20th century--Congresses.
Learning and scholarship--History--20th century--Congresses.
Science--Study and teaching--Spain--History--Congresses.
Spain. Junta para Ampliación de Estudios e Investigaciones Científicas--History--Congresses.
Princeton subject headings:
Consejo Superior de Investigaciones Científicas (Spain)--History--Congresses.
Instituto de Historia (Spain)--History--Congresses.
Learning and scholarship--Spain--History--20th century--Congresses.
Research--Spain--Spain--History--20th century--Congresses.
Science--Study and teaching--Spain--History--20th century--Congresses.