Columbia subject headings:
Berlin (Germany)--In art--Catalogs.
German wit and humor, Pictorial--Catalogs.
Prints, German--Catalogs.
Prints--Germany--Berlin--19th century--Catalogs.
Zille, Heinrich, 1858-1929--Catalogs.
Harvard subject headings:
Zille, Heinrich, 1858-1929--Catalogs.
Princeton subject headings:
Zille, Heinrich, 1858-1929.