Columbia subject headings:
Harvard subject headings:
Griffelkunst-Vereinigung Hamburg-Langenhorn.
Prints--19th century
Prints--20th century
Princeton subject headings:
Graphic arts--Germany--History--19th century.
Graphic arts--Germany--History--20th century.
Printmakers--Germany--19th century.
Printmakers--Germany--20th century.
Prints, German--19th century.
Prints, German--20th century.