Columbia subject headings:
Illustrated books--Europe--Exhibitions.
Illustration of books--Europe--Exhibitions.
Schäfer, Otto--Library--Exhibitions.
Harvard subject headings:
Illustrated books--Europe--Exhibitions.
Illustration of books--Europe--Exhibitions.
Schäfer, Otto--Library--Exhibitions.
Princeton subject headings:
Illustrated books--Europe--Exhibitions.
Illustration of books--Europe--Exhibitions.
Schäfer, Otto--Library--Exhibitions.