Columbia subject headings:
Artists--Austria--Correspondence.
Mandelsloh, Ernst August, Freiherr von, 1886-1962--Correspondence.
Mandelsloh, Ernst August, Freiherr von, 1886-1962--Exhibitions.
Harvard subject headings:
Artists--Austria--Correspondence.
Mandelsloh, Ernst August, Freiherr von, 1886-1962.
Princeton subject headings: