Columbia subject headings:
Books--America--History.
Books--Spain--History.
Censorship--America--History.
Censorship--Spain--History.
Harvard subject headings:
Books--Latin America--History.
Books--Spain--History.
Censorship--Latin America--History.
Censorship--Spain--History.
Princeton subject headings:
Books--America--History.
Books--Spain--History.
Censorship--America--History.
Censorship--Spain--History.