Columbia subject headings:
Anarchists--Spain--Biography.
Durruti, Buenaventura, 1896-1936.
Soldiers--Spain--Biography.
Spain--History--Civil War, 1936-1939.
Spain. Ejército--Biography.
Harvard subject headings:
Anarchists--Spain--Biography
Durruti, Buenaventura, 1896-1936
Soldiers--Spain--Biography
Spain--History--Civil War, 1936-1939.
Spain. Ejército--Biography.
Princeton subject headings: