Columbia subject headings:
Africa, Central--Discovery and exploration.
Africa, Southern--Discovery and exploration.
Explorers--Scotland.
Livingstone, David, 1813-1873.
Harvard subject headings:
Explorers--Africa, Southern--Biography
Explorers--Scotland--Biography
Livingstone, David, 1813-1873.
Princeton subject headings:
Explorers--Africa, Southern--Biography.
Explorers--Scotland--Biography.
Livingstone, David, 1813-1873.