Columbia subject headings:
Gutzkow, Karl, 1811-1878--Congresses.
Gutzkow, Karl, 1811-1878--Contemporaries--Congresses.
Harvard subject headings:
Gutzkow, Karl, 1811-1878--Congresses.
Gutzkow, Karl, 1811-1878--Contemporaries--Congresses.
Princeton subject headings:
Gutzkow, Karl, 1811-1878--Congresses.