Columbia subject headings:
Amazon River Valley--History--Sources.
Brazil--History--Empire, 1822-1889--Sources.
Coutinho, João Martins da Silva, 1830-1889--Archives.
Museu Paraense Emílio Goeldi--Catalogs.
Railroads--Brazil--History--Sources.
Harvard subject headings:
Amazon River Valley--History--Sources--Bibliography--Catalogs.
Arquivo João Martins da Silva Coutinho--Catalogs.
Brazil--History--Empire, 1822-1889--Sources--Bibliography--Catalogs.
Brazil--History--Manuscripts--Catalogs.
Coutinho, João Martins da Silva, 1830-1889--Archives.
Museu Paraense Emílio Goeldi--Catalogs.
Railroads--Brazil--History--Sources.
Princeton subject headings:
Amazon River Valley--History--Sources.
Brazil--History--Empire, 1822-1889--Sources.
Coutinho, João Martins da Silva, 1830-1889--Archives.
Museu Paraense Emílio Goeldi--Catalogs.
Railroads--Brazil--History--Sources.