Columbia subject headings:
Harvard subject headings:
Merchant marine--Austria--History--19th century--Pictorial works.
Merchant marine--Austria--History--19th century.
Merchant ships--Austria--History--19th century--Pictorial works.
Merchant ships--Austria--History--19th century.
Shipping--Austria--History--19th century--Pictorial works.
Shipping--Austria--History--19th century.
Princeton subject headings:
Merchant marine--Austria--History--19th century--Pictorial works.
Merchant marine--Austria--History--19th century.
Merchant ships--Austria--History--19th century--Pictorial works.
Merchant ships--Austria--History--19th century.
Shipping--Austria--History--19th century--Pictorial works.
Shipping--Austria--History--19th century.