Columbia subject headings:
Harvard subject headings:
Peyer, Hermann, 1874-1923.
Physicians--Namibia--Biography.
Railroad construction workers--Namibia--Social conditions--20th century.
Swiss--Namibia--Biography.
Princeton subject headings:
Peyer, Hermann, 1874-1923.
Physicians--Namibia--Biography.
Railroad construction workers--Namibia--Social conditions--20th century.
Swiss--Namibia--Biography.