Columbia subject headings:
Harvard subject headings:
Coins, Danish.
Mints--Denmark--Copenhagen--History--19th century.
Mints--Germany--Altona--History--19th century.
Princeton subject headings:
Coinage--Denmark--Copenhagen--History--19th century.
Coinage--Germany--Altona--History--19th century.
Coins, Danish.
Coins--Germany--Altona--History--19th century.
Mints--Denmark--Copenhagen--History--19th century.
Mints--Germany--Altona--History--19th century.