Columbia subject headings:
Harvard subject headings:
Austrians--United States--Biography--Congresses.
Austrians--United States--History--20th century--Congresses.
Biographies
Immigrants--United States--Biography--Congresses.
Immigrants--United States--History--20th century--Congresses.
Spaulding, E. Wilder (Ernest Wilder), 1899-1997. Quiet invaders.
Princeton subject headings:
Immigrants--United States--20th century.