Columbia subject headings:
Harvard subject headings:
Bremerhaven (Germany)--Emigration and immigration--History--19th century.
Germans--United States--History--19th century.
Immigrants--United States--Social conditions--19th century.
Transatlantic voyages--History--19th century.
United States--Emigration and immigration--History--19th century.
Princeton subject headings:
Atlantic Ocean Region--Emigration and immigration--Health and hygiene--History.
Atlantic Ocean Region--Emigration and immigration--Social aspects--History.
Bremerhaven (Germany)--Emigration and immigration--19th century.
German Americans--History--19th century--Case studies.
Immigrants--United States--19th century.
Passenger ships--History--19th century.