Columbia subject headings:
German Americans--Historiography--Congresses.
German Americans--History--Sources--Congresses.
Swiss Americans--Historiography--Congresses.
Swiss Americans--History--Sources--Congresses.
Harvard subject headings:
German Americans--Historiography--Congresses.
German Americans--History--Sources--Congresses.
Germans--United States--Congresses.
Germany--Emigration and immigration--Congresses.
Swiss Americans--Historiography--Congresses.
Swiss Americans--History--Sources--Congresses.
United States--Emigration and immigration--Congresses.
Princeton subject headings:
German Americans--History.
Germans--United States.