Columbia subject headings:
Harvard subject headings:
Austria--Relations--Brazil.
Brazil--History--Empire, 1822-1889.
Brazil--Relations--Austria.
Leopoldina, Empress, consort of Pedro I, Emperor of Brazil, 1797-1826.
Princeton subject headings:
Austria--Relations (general) with Brazil.
Brazil--History--Empire, 1822-1889.
Brazil--Relations (general) with Austria.