Columbia subject headings:
Harvard subject headings:
Germans--United States
Germans--United States--Biography.
Germany--History--Revolution, 1848-1849.
Hecker, Friedrich, 1811-1881.
Revolutionaries--Germany--Biography
Princeton subject headings:
Germans--United States.
Germany--History--Revolution, 1848-1849.
Hecker, Friedrich, 1811-1881.
Revolutionaries--Germany--Biography.