Columbia subject headings:
Harvard subject headings:
Brinckman, John, 1814-1870--Criticism and interpretation--Congresses.
Groth, Klaus, 1819-1899--Criticism and interpretation--Congresses.
Reuter, Fritz, 1810-1874--Criticism and interpretation--Congresses.
Princeton subject headings:
Authors, Low German--19th century--Congresses.
Brinckman, John, 1814-1870--Criticism and interpretation--Congresses.
Groth, Klaus, 1819-1899--Criticism and interpretation--Congresses.
Reuter, Fritz, 1810-1874--Criticism and interpretation--Congresses.