Columbia subject headings:
Harvard subject headings:
Mauthausen (Concentration camp)
Prisoners of war--Germany
Prisoners of war--Spain.
Spain--History--Civil War, 1936-1939--Refugees.
World War, 1939-1945--Prisoners and prisons, German.
Princeton subject headings:
Mauthausen (Concentration camp)
Spain--History--Civil War, 1936-1939--Refugees.
Spaniards--Austria--Mauthausen--History--20th century.
World War, 1939-1945--Prisoners and prisons, German.