Columbia subject headings:
Harvard subject headings:
Deutsche Tiefsee-Expedition (1898-1899)
Marine biology
Oceanography
Scientific expeditions--Atlantic Ocean--History--19th century.
Scientific expeditions--Indian Ocean--History--19th century.
Underwater exploration--Atlantic Ocean--History--19th century.
Underwater exploration--Indian Ocean--History--19th century.
Valdivia (Ship)--History.
Princeton subject headings:
Deutsche Tiefsee-Expedition (1898-1899)
Marine biology.
Oceanography.
Scientific expeditions--Atlantic Ocean--History--19th century.
Scientific expeditions--Indian Ocean--History--19th century.
Underwater exploration--Atlantic Ocean--History--19th century.
Underwater exploration--Indian Ocean--History--19th century.
Valdivia (Ship)--History.