Columbia subject headings:
Art historians--Germany--Correspondence.
Critics--Germany--Correspondence.
Fraenger, Wilhelm, 1890-1964--Correspondence.
Harvard subject headings:
Art historians--Germany--Correspondence.
Critics--Germany--Correspondence.
Fraenger, Wilhelm, 1890-1964--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Fraenger, Wilhelm, 1890-1964--Correspondence.
Frommel, Wolfgang, 1902---Correspondence.