Columbia subject headings:
Bibliothek Otto Schäfer.
Book collecting--History.
Illustrated books--History.
Schäfer, Otto--Library.
Harvard subject headings:
Early printed books--Europe, German-speaking.
Illustrated books--Europe, German-speaking.
Illustration of books--Europe, German-speaking.
Prints, European--Europe, German-speaking.
Prints, European.
Schäfer, Otto--Library.
Princeton subject headings: