Columbia subject headings:
Harvard subject headings:
Antislavery movements--Spain--History--19th century.
Slavery--Law and legislation--Spain--History--19th century.
Slavery--Spain--History--19th century.
Princeton subject headings:
Antislavery movements--Spain--History--19th century.
Slavery--Law and legislation--Spain--History--19th century.
Slavery--Spain--History--19th century.