Columbia subject headings:
Harvard subject headings:
Brazil--Emigration and immigration--History--19th century--Congresses.
Germans--Brazil--History--19th century--Congresses.
Germans--United States--History--Congresses.
Immigrants--Brazil--History--19th century--Congresses.
Immigrants--United States--History--Congresses.
Rhineland-Palatinate (Germany)--Emigration and immigration--History--Congresses.
United States--Emigration and immigration--History--Congresses.
Princeton subject headings:
Brazil--Emigration and immigration--History--19th century--Congresses.
Germans--Brazil--History--19th century--Congresses.
Germans--United States--History--Congresses.
Immigrants--Brazil--History--19th century--Congresses.
Immigrants--United States--History--Congresses.
Rhineland-Palatinate (Germany)--Emigration and immigration--History--Congresses.
United States--Emigration and immigration--History--Congresses.