Columbia subject headings:
Madrid (Spain)--History--Siege, 1936-1939.
Spain--History--Civil War, 1936-1939--Campaigns.
Spain--Politics and government--1931-1939--Sources.
Spain--Politics and government--1931-1939.
Harvard subject headings:
Madrid (Spain)--History--Siege, 1936-1939.
Spain--History--Civil War, 1936-1939--Campaigns.
Spain--Politics and government--1931-1939--Sources.
Spain--Politics and government--1931-1939.
Princeton subject headings:
Madrid (Spain)--History--Siege, 1936-1939.
Spain--History--Civil War, 1936-1939--Campaigns.
Spain--Politics and government--1931-1939--Sources.
Spain--Politics and government--1931-1939.