Columbia subject headings:
Harvard subject headings:
Germany. Kriegsmarine--History--19th century.
Haack, Rudolph, 1833-1909.
Naval architects--Germany--Biography.
Shipbuilding industry--Technological innovations--Germany--History--19th century.
Shipbuilding industry--Technological innovations--Germany--History--20th century.
Shipbuilding--Germany--History--19th century.
Princeton subject headings:
Civil engineers--Biography.
Haack, Rudolph, 1833-1909.
Naval architects--Biography.
Shipbuilding--Biography.