Columbia subject headings:
Art nouveau--Germany--Exhibitions.
Pankok, Bernhard, 1872-1943--Exhibitions.
Harvard subject headings:
Art nouveau--Germany--Exhibitions.
Pankok, Bernhard, 1872-1943--Exhibitions.
Princeton subject headings:
Art nouveau--Germany--Exhibitions.
Pankok, Bernhard, 1872-1943--Exhibitions.