Columbia subject headings:
Wilhelm-Busch-Museum.
Wit and humor, Pictorial.
Harvard subject headings:
Caricature--History--Catalogs.
Caricatures and cartoons--History--Catalogs.
Wilhelm-Busch-Museum--Catalogs.
Wit and humor, Pictorial--Catalogs.
Princeton subject headings:
Caricature--History--Catalogs.
Caricatures and cartoons--History--Catalogs.
Wilhelm-Busch-Museum--Catalogs.
Wit and humor, Pictorial--Catalogs.