Columbia subject headings:
Duwe, Harald, 1926-1984--Exhibitions.
Harvard subject headings:
Duwe, Harald, 1926---Catalogues raisonnés.
Duwe, Harald, 1926---Exhibitions.
Duwe, Harald, 1926-1984--Exhibitions.
Princeton subject headings:
Duwe, Harald, 1926-1984--Exhibitions.