Columbia subject headings:
Soviet Union--Relations--Spain.
Spain--Politics and government--1808-1814.
Spain--Politics and government--1814-1868.
Spain--Relations--Soviet Union.
Harvard subject headings:
Russia--Relations--Spain.
Soviet Union--Relations--Spain.
Spain--Politics and government--1808-1814.
Spain--Politics and government--1814-1868.
Spain--Relations--Russia.
Spain--Relations--Soviet Union.
Princeton subject headings:
Russia--Relations--Spain.
Spain--Politics and government--1808-1814.
Spain--Politics and government--1814-1868.
Spain--Relations--Russia.