Columbia subject headings:
Artists--Germany--Correspondence.
Gropius, Walter, 1883-1969--Correspondence.
Schwitters, Kurt, 1887-1948--Correspondence.
Schwitters, Kurt, 1887-1948.
Harvard subject headings:
Artists--Germany--Correspondence.
Dadaism--Germany.
Gropius, Walter, 1883-1969--Correspondence.
Schwitters, Kurt, 1887-1948--Correspondence.
Schwitters, Kurt, 1887-1948--Criticism and interpretation.
Princeton subject headings:
Artists--Germany--Correspondence.
Gropius, Walter, 1883-1969--Correspondence.
Schwitters, Kurt, 1887-1948--Correspondence.
Schwitters, Kurt, 1887-1948.