Columbia subject headings:
Harvard subject headings:
Conradt, Ludwig, 1853-1920.
Foreign workers--Namibia--Biography.
Germany--Colonies--Africa--Economic conditions.
Namibia--History--1884-1915.
Princeton subject headings:
Conradt, Ludwig, 1853-1920.
Germans--Namibia--Biography.
Germany--Colonies--Africa--History.
Namibia--History--1884-1915.