Columbia subject headings:
Harvard subject headings:
Agriculture--Brazil--Amazonas--History--20th century.
Amazonas (Brazil)--Emigration and immigration.
Amazonas (Brazil)--Rural condiitons.
Japan--Emigration and immigration.
Japanese--Brazil--Amazonas--History--20th century.
Princeton subject headings:
Agriculture--Brazil--Amazonas--History--20th century.
Amazonas (Brazil)--Emigration and immigration.
Amazonas (Brazil)--Rural conditions.
Japan--Emigration and immigration.
Japanese--Brazil--Amazonas--History--20th century.