Columbia subject headings:
Harvard subject headings:
Immigrants--United States--History--20th century
Swiss Americans--History--20th century.
Swiss--United States--Biography.
Switzerland--Emigration and immigration--History--20th century.
United States--Emigration and immigration--History--20th century.
Princeton subject headings:
Immigrants--United States--History--20th century.
Swiss Americans--History--20th century.
Swiss--United States--Biography.
Switzerland--Emigration and immigration--History--20th century.
United States--Emigration and immigration--History--20th century.