Columbia subject headings:
Brazil--Discovery and exploration--Russian--Sources.
Explorers--Brazil--History--19th century--Sources.
Explorers--Russia--History--19th century--Sources.
Langsdorff, G. H. von (Georg Heinrich), 1774-1852--Travel--Brazil--Sources.
Ėkspedit︠s︡ii︠a︡ akademika G.I. Langsdorfa v Brazilii︠u︡ (1821-1829)--History--Sources.
Harvard subject headings:
Brazil--Discovery and exploration--Russian--Sources.
Explorers--Brazil--History--19th century--Sources.
Explorers--Russia--History--19th century--Sources.
Ėkspedit︠s︡ii︠a︡ akademika G.I. Langsdorfa v Brazilii︠u︡ (1821-1829)--History--Sources.
Langsdorff, G. H. von (Georg Heinrich), 1774-1852--Journeys--Brazil--Sources.
Langsdorff, G. H. von (Georg Heinrich), 1774-1852--Travel--Brazil--Sources.
Princeton subject headings: