Columbia subject headings:
United States--Commerce--History--19th century.
United States--History, Naval--To 1900.
United States. Navy--History--19th century.
Harvard subject headings:
United States--Commerce--History--19th century.
United States--History, Naval--To 1900.
United States. Navy--History--19th century.
Princeton subject headings:
United States--Commerce--History--19th century.
United States--History, Naval--To 1900.
United States. Navy--History--19th century.