Columbia subject headings:
Harvard subject headings:
Europe--Intellectual life--19th century.
Europe--Politics and government--1848-1871.
Europe--Politics and government--1871-1918.
Hillebrand, Karl, 1829-1884
Historians--Germany--Biography
Princeton subject headings:
Europe--Intellectual life--19th century.
Europe--Politics and government--1848-1871.
Europe--Politics and government--1871-1918.
Hillebrand, Karl, 1829-1884.
Historians--Germany--Biography.