Columbia subject headings:
Soviet Union--History--German occupation, 1941-1944.
Spaniards--Soviet Union--History--20th century.
World War, 1939-1945--Campaigns--Soviet Union.
Harvard subject headings:
Political refugees--Spain--History--20th century
Soviet Union--History--German occupation, 1941-1944.
Spain--History--Civil War, 1936-1939--Refugees.
Spaniards--Soviet Union--History--20th century.
World War, 1939-1945--Campaigns--Eastern Front
World War, 1939-1945--Campaigns--Soviet Union.
World War, 1939-1945--Participation, Spanish.
Princeton subject headings:
Soviet Union--History--German occupation, 1941-1944.
Spaniards--Soviet Union--History--20th century.
World War, 1939-1945--Campaigns--Soviet Union.