Columbia subject headings:
Cantabria (Spain)--History--20th century.
Palencia (Spain)--History--20th century.
Spain--History--Civil War, 1936-1939.
Harvard subject headings:
Cantabria (Spain)--History--20th century.
Palencia (Spain)--History--20th century.
Spain--History--Civil War, 1936-1939.
Princeton subject headings: