Columbia subject headings:
Africa--Description and travel.
Africa--Social conditions.
Hemminger, William J.--Travel--Africa.
Travelers--Africa--Biography.
Harvard subject headings:
Africa--Description and travel.
Africa--Social conditions.
Hemminger, William J.--Travel--Africa.
Travelers--Africa--Biography.
Princeton subject headings:
Africa--Description and travel.
Africa--Social conditions.
Hemminger, William J.--Travel--Africa.
Travelers--Africa--Biography.